Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa19c2006ba191e9…

MALICIOUS

PDF

85.0 KB Created: 2021-08-16 19:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0492fa4dc76c833c055029ae599d1489 SHA-1: 080ca55a269473e1b8b02c7a3b77bf6e3d087e4d SHA-256: fa19c2006ba191e936dddba29c00227761f3f057145a0e76cee5c0083e424872
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are likely part of a link farm designed to redirect users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160943ee93fe66---68602684395.pdf In PDF document text
    • http://marmaraisg.com/images_upload/files/11353352312.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/c577de252bfbf04bfe57116cefa7c0c8/14838556273.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/5502748317.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/4c437aabd6496683962a8a86cf1ca9ca/moposidezubima.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/61c1fbbd662bec800c355aa2daeede77/ruzikowisibep.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/kuxamosetukero.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/xawipaladesidolegefirinaj.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/2822430053.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/38574791587.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/55f9235b294c2ad94081efd82540b5fc/25611885724.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/70644588412.pdfIn PDF document text
    • http://geose.ru/userfiles/file/9978821206.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/68504609860.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/1cc1ef2f723887cc46e28dced73eaafe/33834693961.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/44146503970.pdfIn PDF document text
    • https://ocbond.org/userfiles/files/kebunokajezopegidu.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/fogogupekuzosev.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/37904151059.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/zopamazegakanebumun.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9f7d0cd1f---42555582161.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/zotutalodulanezifatonikif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=nasb+bible+1995+pdf+downloadPDF 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_off0000e7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CE 17148 bytes
SHA-256: acfa4b8f32c550f043a89cf6c742932d5028d1fb5c113be020d13d8f0a26450c
font_01_sfnt_off0001149b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB2 10852 bytes
SHA-256: e5b56221de25e5423acb505d5a321bdacb4e343399b2fd631fa81edb44a6891b