Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d9b8ff5ceff149…

MALICIOUS

PDF

101.7 KB Created: 2021-07-03 07:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: daad7faa2a197bf9248ba0c0258b2aed SHA-1: 59236157c752bcd3f5c9fb835c0db51ae4ce61ae SHA-256: 74d9b8ff5ceff1499142ab49619ffe81e71dd2766b322fd54ed71b6deb9cf900
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160785ac6ac51b---fexonaxogagobabidotibiw.pdf In PDF document text
    • http://simonide.org/userfiles/file/94442861386.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/3f53c022f06b82f1dd2a0fa85b3774bb/39783838031.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/56548744678.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/5b10b9ce6351ae3895561340e828ff32/woxiwikinadepatu.pdfIn PDF document text
    • https://taperagi.com/contents//files/99633472352.pdfIn PDF document text
    • http://shavers-boles.com/clients/7/73/73b1ad2e2c85410b7b015c0c79a6caf4/File/gobatatepegagifez.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a91b2f5cb---jinel.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f47e49bd37---18923288635.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/87415933174.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/8042871245b2d92a8ee0e0c41568fa03/68168166416.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/sujituno.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/dd029ec9ab493de6d4c672cd9101b503/77010669691.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e095d24e2b3363ebf29ae5fc7158c2d4/33284400562.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1982a79d18---34345106311.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609176eebbc15---105804091.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/natikuwifajotimitudi.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/f8501e988f72b24a5871fce36f950b27/63321507290.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/32764390834.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085e65b7847a---xikebofawegudevidovinoxow.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/68722ece4739f35786990f055d9a8ac2/52356390470.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/90408143482.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/26c8f9304ee1c2e87ec5833e3b262764/lekaluzodedimopone.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b67df157d0---48620035809.pdfIn PDF document text
    • https://stackovIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=create+if+not+exists+sqlPDF 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_off00012b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2B 10484 bytes
SHA-256: 65c141cdfc855554876cf78c1a79b614861a7af1e8b89f03d02c2d204ec64c04
font_01_sfnt_off0001432f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1432F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B41 17552 bytes
SHA-256: 10a09a836ddba9470388f8c46df056c1567012d747c7e3f42fb170e47f4fb079