Malicious PDF — malware analysis report

Static analysis result for SHA-256 46500d046ec2d12d…

MALICIOUS

PDF

84.4 KB Created: 2021-02-21 03:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: cc36eeea5971cd10da13e0909b94bc8d SHA-1: da5a898b18e3cf925185d2010d83e2fe136a0268 SHA-256: 46500d046ec2d12d17ce8ff01f9a65c91f06081901d312738689b735e5503446
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=how+do+you+fix+a+kenmore+dryer+that+is+not+heating PDF link annotation
    • http://apkweb.net/jegisusabipojubilepinip75ocm.pdfIn PDF document text
    • http://honey-love.ru/grade_12_economics_textbook_ethiopiahzx5r.pdfIn PDF document text
    • http://igclienteam.com/839990223544glrd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_6021041df2de7.pdfIn PDF document text
    • http://onlinetiser.website/anatomie_de_l_articulation_du_coude5tlyq.pdfIn PDF document text
    • http://lefenup.22web.org/71037427997.pdfIn PDF document text
    • http://pshcomonhere.xyz/five_point_someone_free_downloadtb6a1.pdfIn PDF document text
    • http://kluruu.info/zhu_scalp_acupuncture_bookni5x8.pdfIn PDF document text
    • http://getallcreditscores.info/gosemefaresekaxusafig4h048.pdfIn PDF document text
    • https://wolofineso.weebly.com/uploads/1/3/4/5/134598063/b031aaed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vezibumajiles.epizy.com/zusivijet.pdfIn PDF document text
    • http://ropajevunowijit.epizy.com/affliction_warlock_artifact_challenge_guide.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001063f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063F 5576 bytes
SHA-256: 9fc1d884011353c450e609c8bb4a54b3ed58196005050fe3c07f6fdd981f18ed
font_01_sfnt_off00011926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11926 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off000121b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B3 9996 bytes
SHA-256: 92d9777d45f820466bf268668bc5e4334c513d86e0845f23c321e554ae46bef1

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