Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e691323794a172…

MALICIOUS

PDF

86.1 KB Created: 2021-09-16 11:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3fcec53d7d1989bd3437eb17f3fad30a SHA-1: 3b8d114731e2ce9ace0a7ed7aa66276f9d5f0293 SHA-256: 99e691323794a172b82b4f5aade55a68e8386de2c6d61735f37387431e1ade85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, suggesting a link farm designed to lure users to malicious sites. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16136c9fc8883f---72181285575.pdf In PDF document text
    • http://kerekagy.hu/UserFiles/file/77668636892.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/pawasamiwetarabewejijoba.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1614250aaa0b55---gojavisimoparorese.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/23745026309.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/xezexolapu.pdfIn PDF document text
    • https://avela.md/userfiles/file/3646896310.pdfIn PDF document text
    • http://sswjeans.com/files/1371075179.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/74112220089.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/marasuwokibinopejavipix.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/numolasegopuzozasakadixak.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/kitalikavekigere.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161412546de8e2---44990085970.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/29221817993.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/tojizeruwag.pdfIn PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/mejifatibenaxutijirogi.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/84543422982.pdfIn PDF document text
    • http://elitacasa.it/images/file/giruxojefavu.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613dcee9e004b---94061098777.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/62349705961.pdfIn PDF document text
    • http://quartierdete.fr/uploads/fckeditor/file/77698483353.pdfIn PDF document text
    • http://baominhlabors.com/upload/files/41318924577.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/pirezowar.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/ac75061401e76ed336471ca0e0391a51/lodidokifijovitodow.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/46035544227.pdfIn PDF document text
    • https://novinfasteners.com/userfiles/file/95104565404.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/76181704722.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=the+book+theif+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC48 10208 bytes
SHA-256: 2f1a4a2fd7431beec762b94bd031053219d63ab4d82776e8bce44c66404de1b7
font_01_sfnt_off0001030b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030B 18416 bytes
SHA-256: 8ffa9bd82a32dab21add684279e286b32e65552cb5b808a2aaea1c6a78b59043
font_02_sfnt_off000132d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.