Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2cab3f102e6b34…

MALICIOUS

PDF

72.4 KB Created: 2021-09-04 17:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 2d499577f7df8342d7011b4c9fafef5c SHA-1: 49bb017cdd2508310db5b2ca4ee827a5581e716e SHA-256: 6c2cab3f102e6b34118443ce43d1f044d89324dfffc2b351135d3daf0217ab9b
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a link farm pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV also strongly indicated maliciousness. The document's structure and embedded URLs suggest it is designed to redirect users to potentially harmful external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://amatnieks.com/pictures/image/46910945114.pdf In PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a31e2c7de4---36534035990.pdfIn PDF document text
    • https://alutat.com/data/file/fenomudosagu.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/aa174d7d38e25b39ef3d038932affffa/fodekagagewokeseli.pdfIn PDF document text
    • https://emmaushuis.org/pages/30197238616.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/75176387da05d4df24851b7b3ac162c4/40482932629.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/44778439846.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/jipikibolor.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/fvudtngj6bc37h0i6e19tollva/mipumalerenu.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/31804732599.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/vegusokikegabavavum.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/8inuc0lp2ukfdevuonfufvht32/mojijatepag.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cf74dcf69---5348222743.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/fisopibabitobabapigitik.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/pajexu.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/fef4uasoer3ou0de55oett8s0v/90241887326.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/muturuwajafarudo.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160db8f0d6d51d---mepagazamunuredulojonub.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/71057506629.pdfIn PDF document text
    • http://lhsclassof1971.com/clients/74120/File/88925809744.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/kobaxoxew.pdfIn PDF document text
    • http://xycrusher.com/d/files/1779068821.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d5d0a9215---zovefefivotepajamevi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=sbi+new+debit+card+application+form+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_off0000b8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8E2 16432 bytes
SHA-256: ffde2db33f3b45b95b74a01c253cab18feab1456e2448ae27b0528e1d9c2036e
font_01_sfnt_off0000e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0F 10916 bytes
SHA-256: 711c6e3bff65005dac0882b83a379bc7b47dbd4389af964e34844296c8dfc2ff