Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a184f4f39ad280…

MALICIOUS

PDF

106.4 KB Created: 2021-02-28 02:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 191a2e735a54e071f01fe81364ae63cc SHA-1: 27559c023c798d22370cbda63d056bdc15a2bf04 SHA-256: e6a184f4f39ad28023b5b797b43559d845cfb6169fb22aeb06442f2e5719101c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO poisoning or to host phishing content. The presence of embedded URLs suggests the document's primary purpose is to redirect users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=triangle+congruence+overlapping+triangles+worksheet+1 PDF link annotation
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/malemiluji_zibaza_gudikikozuwu.pdfIn PDF document text
    • https://sedozexejelem.weebly.com/uploads/1/3/1/8/131871533/filaliz-tusivet.pdfIn PDF document text
    • https://migixemigesafo.weebly.com/uploads/1/3/1/3/131381985/nupox-sajejovasul-puwupudem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401517/normal_601ae33d08296.pdfIn PDF document text
    • http://klyshsheff.xyz/bhaag_milkha_bhaag_full_movie_1080pnpth4.pdfIn PDF document text
    • http://centerbluebadge.com/the_never_game_book_reviewoorus.pdfIn PDF document text
    • http://noxivivixuza.22web.org/ipmn_fukuoka_guidelines.pdfIn PDF document text
    • http://jezolagewe.iblogger.org/mitujowibizukitu.pdfIn PDF document text
    • https://mizavuzozubex.weebly.com/uploads/1/3/4/7/134730625/2653754.pdfIn PDF document text
    • http://zetomanebegox.iblogger.org/48738775382.pdfIn PDF document text
    • https://luligokim.weebly.com/uploads/1/3/4/7/134715748/jadewekidisi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laguwirir.epizy.com/fokoxuwazu.pdfIn PDF document text
    • http://dejupaxifitat.rf.gd/nobawixeroronajamugefa.pdfIn PDF document text
    • http://bozivexaterem.epizy.com/japesoxupujomu.pdfIn PDF document text
    • http://gixagezupupif.rf.gd/compensation_benefits_policy_template.pdfIn PDF document text
    • http://nidalufexif.epizy.com/best_interview_answers_for_administrative_assistants.pdfIn PDF document text
    • http://lefanivewog.epizy.com/xeximibibitidutudevizam.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFA 9152 bytes
SHA-256: c0e6a2e84b6eea9ebc52b0053ff378e86b56cd54083c31db398fd300306c12ca
font_01_sfnt_off00014a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A85 5412 bytes
SHA-256: 0d3017d15dbdb63cb07355c9c6b015cefda3c53211a9c251e64299b7f6f30641
font_02_sfnt_off00015d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D0B 11520 bytes
SHA-256: cdafd7df22216181c0772b3147d8f1f5998c51d6fdfb70242d4fc01d92949f68
font_03_sfnt_off0001848f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1848F 16420 bytes
SHA-256: b795e548876ab3017dc148611ac6540991456c4982174010e3f023478e1247b2

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