Malicious PDF — malware analysis report

Static analysis result for SHA-256 15971678b4d63c97…

MALICIOUS

PDF

78.7 KB Created: 2021-04-04 12:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 58ddd5eb835ea94f78909b84a99ef495 SHA-1: c7651661dcc32d9078b305d4baaedb848aa07552 SHA-256: 15971678b4d63c9705cb91952d3d85936425d4f19ca6e8f17a9a05b467d8fd6a
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=since+i+was+7+years+old+lyrics PDF link annotation
    • http://fitdieta.com/wamitigm1yyc.pdfIn PDF document text
    • http://nonretloli.site/686579259u25y6.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/supplementary_agreement_format_for_llp79zpo.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/hfBjaNW/red_balloon_chicago.pdfIn PDF document text
    • http://devgm.design/the_new_real_book_eb_free_downloadu2ocx.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/tjdVgcU/hoop_stars_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/ifheidR/67892521535.pdfIn PDF document text
    • http://meblik.su/95354104082a1lch.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/jbV4AI4/81233973803.pdfIn PDF document text
    • http://fb-pageunderreview.com/crossed_ally_condie_epubtgi2d.pdfIn PDF document text
    • http://teaitalis.space/dazalafonirk58a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/vovudamapijakalezu.pdfIn PDF document text
    • https://5d9de69b-f80b-44d6-9c2d-9027806fef0b.filesusr.com/ugd/e26ad2_6f41a8f0ecea44af99e044755538701d.pdf?index=trueIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_8d598a5b7b604532ab173f8398b888ef.pdf?index=trueIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_fde30ee6c021439ebb2d696ead71b38a.pdf?index=trueIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_bb3ad78770d04c87a16d27a7fc0280a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/telebululalesupabakovusis.pdfIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_11d86d049937462ba441f9fb53e64c86.pdf?index=trueIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_131f6c2935d94c9aba73ce118edc0260.pdf?index=trueIn 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

Related samples 7

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_off0000e995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE995 5020 bytes
SHA-256: f6edfa8c25f75e7ffcd2235bdc8d34e253c6f9d61eb79a539d280673382d32e5
font_01_sfnt_off0000faad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAD 10772 bytes
SHA-256: 9d50e44235b4bad9c2721fad72952c7da2b9e3cee17cffacf4c58b03e818170a
font_02_sfnt_off00011f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F73 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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