Malicious PDF — malware analysis report

Static analysis result for SHA-256 981322c26d866e10…

MALICIOUS

PDF

76.3 KB Created: 2021-06-11 12:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 07860e5b02cab295566b692304863f3d SHA-1: 5ceb53aed01a21411e20d8f961673a8fa082f3fa SHA-256: 981322c26d866e10b603c99a993888f4c90c2306d639c24e59cfddcf1b8534e3
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://pixomot.ru/pbw?utm_term=brand+book+indesign+template+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417808/normal_6040ea7c015cd.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4376380/normal_60b14da2cfcd1.pdfIn PDF document text
    • https://jomunibudax.weebly.com/uploads/1/3/4/3/134342604/ririsagoxena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403673/normal_6029f08be644b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480389/normal_60249f4be835d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446158/normal_60076dd0c75dc.pdfIn PDF document text
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/3b4e71950950d35.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
    • http://noxixap.pbworks.com/f/90649003688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/804110ec-f53d-4835-8163-9ed95449260a/73005100010.pdfIn PDF document text
    • http://guwodav.pbworks.com/w/file/fetch/144917280/prepare_a_journal_entry_of_all_your_business_transactions.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/f/77437845171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c6d2e9-a26e-4236-a680-ea0af7c00b77/critical_thinking_worksheets_for_kinder.pdfIn PDF document text
    • http://feteselulo.pbworks.com/f/dorexomasinavuxax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf8139e-b451-4941-a122-2a5af8db18c5/toro_ultra_blower_vac_51619_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c70973f-1c3b-4235-ac4c-01f5da0ee619/41450502934.pdfIn PDF document text
    • http://genarozep.pbworks.com/f/exercices_verbe_prendre_au_prsent.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03A 5400 bytes
SHA-256: f2636be09097b255cbd764c94ae74fc6912b2fc157bf8e6048123d2f6f014b59
font_01_sfnt_off0000f276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF276 10476 bytes
SHA-256: a5e9ddf18bd280a4087e23ff062565e7de12e2493c0c55e9100fbdcdd3191276
font_02_sfnt_off0001161b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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