Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b768e724dbee6d…

MALICIOUS

PDF

77.7 KB Created: 2021-03-10 02:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bf9459b9a326361f2d6e74209f78ed7b SHA-1: 117a1500af1f98260453ba9e13eedafc5d5b2006 SHA-256: 57b768e724dbee6dab3744cbb5d3ae83a912486664e566500b93a73f800d1185
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://pelibifir.ru/strik?utm_term=can+you+use+a+bluetooth+mouse+without+the+dongle PDF link annotation
    • http://wikowezenitezo.medianewsonline.com/baldurs_gate_2_enhanced_edition_pc_review.pdfIn PDF document text
    • http://alcexpress3.xyz/nutritional_medicine7hjzp.pdfIn PDF document text
    • https://cdn.sqhk.co/dulemokel/aSM3id9/email_format_letter_of_interest.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_601a807ca7a5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_603962b4280ac.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/astro_a20_ps4_best_settings.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_604669c8e1b27.pdfIn PDF document text
    • http://xejitifuwoligaf.mypressonline.com/62234260973.pdfIn PDF document text
    • http://wide-do.top/canon_rebel_xt_review3fv58.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/85063020250.pdfIn PDF document text
    • http://mesanezedid.mypressonline.com/aminoglycosides_mode_of_action.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410216/normal_5fc7caab15aaf.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/iHjcKOb/33170369882.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485946/normal_5ff06dea8dfbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488317/normal_60436dd4d2eaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393033/normal_5fd9bf2e6d747.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe7f1063-4352-4f4b-8459-d54a05e45862/2015_jeep_grand_cherokee_overland_v6_towing_capacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ba85a1-aa1f-4999-bfb8-092243b86ca9/i_finally_found_where_i_belong_youre_everything_i_need.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b986a6c-bf1f-440a-8156-e3940881b555/294015966.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 5380 bytes
SHA-256: c906b80abc93fc38fad8c25073fb95a17831fbfded07bb3387c263cf7dc72f9f
font_01_sfnt_off000104d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D9 10776 bytes
SHA-256: 814331193c9a3e7b2e2d930eeeb69d648c763c25c1a77047e09166327936f09a

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