Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ad0691bab70538…

MALICIOUS

PDF

103.5 KB Created: 2021-07-01 21:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5e83713031fc227d8187475725210432 SHA-1: 96ad5f04d5ad44fba8c3cc96409a2dfb3490fd4e SHA-256: a6ad0691bab7053878071f98e19eb03363a7300515eaba4351015f4563f99693
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with PDF-based malware delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9767

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 https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/1813b4fc1e03f38850e1af367e30344c/84482880728.pdf In PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3db6a9dd74---17976939289.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/3dede5738ad2cd9423c2af3c769e60a2/bozufovemoxobefofabaja.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/ff54p0ad8si2f4h0r55cc89nb2/kozadu.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///84950810862.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/22064851181.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/jisekakuxajusapilip.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad8ae2914a---xufuwegika.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/52594864998.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdad0274d73---43330940989.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210508174745_830715060.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f51e4fb32---zijowa.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16090446733403---gadudarotifovoraluzuvaf.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa901d47678---domebafogobedaremugi.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/r03vk9a9k1ksk45emgptvde697/43823967886.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/cb3b1a925b5eb6e9d348a7220728ee19/53525282589.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/zogum.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/2110a329e6615fc35b0bd33a14f65c13/pabilijogegudagix.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/d90p3f62ehvegcv94e1r77lte0/woraledemizuxodukoze.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/40948997479.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/2544303d94bd74e5cdaad00b4552824d/22308256605.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/e4564bb7ac556d66f84c240503f6b12e/2545620830.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a4ec9398e94d7f2d555cab1ae7a344e9/fifijusuje.pdfIn PDF document text
    • http://industrialdevices.in/uploads/posaxizora.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/rafaruxolukuremakovoju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=physical+condition+meaningPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00017211.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17211 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_00_sfnt_off0000fbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDE 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_01_sfnt_off00010959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10959 22752 bytes
SHA-256: 1b3d6355ba6bce55923b2d02203bedcf8672336413e4e928287d6c02b1f7ba02
font_02_sfnt_off00014162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14162 10832 bytes
SHA-256: a21b6c64e09fc86bde90de04c09b0cdcd45114676e276d35546d396d2178b9f9
font_03_sfnt_off00015a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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