Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee29c502dd302e2b…

MALICIOUS

PDF

88.4 KB Created: 2021-08-05 02:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 069c20182f064ef339ee3266f6d9b41e SHA-1: 6b155cb52c404271ce6cc351d4809851486b6431 SHA-256: ee29c502dd302e2b1027703b679e1e462d7ba9d14a62945271c468682584218b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, indicative of a link farm used for phishing or malware delivery. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL analysis point to a malicious document designed to lure users to external, untrusted sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://styropapex.pl/userfiles/file/32458835805.pdf In PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/010e4d0f3dfb4132c33d91ee008d089f/rugogonilakanotepomefixif.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798efc05526---49089594901.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec4c201c19---55799984228.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d67332769af---9201498194.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d3e5cbfc89---98815908048.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/865337502feb888bd160318ff15af558/gijuvugilaruzu.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083327bb7766---gexojugolatitufodiwi.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f947d5343f---xuselozuparadaj.pdfIn PDF document text
    • http://delve-cr.com/uploads/52450741596.pdfIn PDF document text
    • http://dzbnf.com/upload/file///42000838538.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/bdb90ce7d3e2c266bfb2ee0941851399/1077246414.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/61924193710.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/52453467203.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/53144798788.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/91565989053.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca94129164---85823597135.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/50157936407.pdfIn PDF document text
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/25811835954.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/14291741085.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7a5f2e10---50184775732.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+setup+a+wifi+hotspot+on+my+computerPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D10 17344 bytes
SHA-256: a6dff4338038673a8549aad2d15877bcaae92e844e111a0984adb9924f9e9f9f
font_02_sfnt_off00013a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4D 10988 bytes
SHA-256: 9e64791f4f9fc25d895149dd718332338e6542257b31f162281e01f808fdd913

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