Malicious PDF — malware analysis report

Static analysis result for SHA-256 addba57eed357d26…

MALICIOUS

PDF

95.0 KB Created: 2021-07-07 10:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4952063d9cebed130d4b5549fb8860ca SHA-1: 40402f63697234709f53cde7671cdeb1f4777259 SHA-256: addba57eed357d264cb5c8afc278c8c10310c85ff87d3941c1c5d7af6343d8c1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The PDF was flagged by multiple heuristics as a brand-impersonation credential phishing lure, specifically impersonating Apple. The embedded URLs, such as the one pointing to 'brodart01.com', are part of a link farm hosted on compromised CMS platforms, indicating a phishing infrastructure. Although no scripts were explicitly extracted, the PDF structure and URL analysis strongly suggest it's designed to redirect users to malicious sites for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+delete+a+signature+on+a+pdf.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a11c2ce5c66---bewuxomeze.pdf In PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/pawebofemujagujavejada.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/90393985691.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/547105839b0defcdcf5c0e17d9696599/jokoralivukubopix.pdfIn PDF document text
    • https://shopabrang.com/images/files/60291155878.pdfIn PDF document text
    • http://geose.ru/userfiles/file/85833824339.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/42958040292.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/6636844555.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/82880666565.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ce2a68053---boxaxalagesolezalowirinor.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/tugujilazetodemofovex.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/1e89aa138f1452479babdd44e6662bc6/fabujimidubuxef.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/32314997002.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/jugegelu.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/davozig.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/51840092944.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210705104954.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/70784871841.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/f0d9c50367035f2829c55fe93cf2e009/11748882157.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/hbodnomr9cl3a0813geavrudh9/70135712878.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/lularazale.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/95134296624.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/jloh6juh3mtcnckcknavhmgdvd/72868957428.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/ec4a43d6d9b15fe2db7faf5129b2ac24/figenowuvujobojox.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/duwokifonimugapexovir.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/80459309541.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/04ed6f9d78682998891dd702e8221bfe/73443851844.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b83efd2098f---bewasizumalamaginil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+delete+a+signature+on+a+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D0 1636 bytes
SHA-256: e3a1ca7fbcde87b6e2bc585668cff1a50452d2a09c95c546c16e9f90aebd6500
font_01_sfnt_off00010fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA2 10852 bytes
SHA-256: c8232af7efe6d328c6f09d98da31c4f96cf13a8d9aa6089d9a52d6af721cc320
font_02_sfnt_off00012898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12898 17512 bytes
SHA-256: b7978961a107cdd292611d331dfb31479ffae50cdadba3fefc073adcb265937b
font_03_sfnt_off000155d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1