Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e24c70384578dc8…

MALICIOUS

PDF

70.9 KB Created: 2021-06-10 12:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c29891b56ccba7e3fac48d779dcac612 SHA-1: 46fa4ae85ca1539d84ade6d188c75dbda16bcb27 SHA-256: 9e24c70384578dc879fff6b257fe148577e1768b3b61f2c054f75fad9e7d68ae
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://huntic.ru/pbw?utm_term=quantitative+analysis+chemistry+notes+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451542/normal_6026315236615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_60bfdf406002f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475586/normal_60055076b3d3c.pdfIn PDF document text
    • https://lapefobok.weebly.com/uploads/1/3/4/6/134663543/torilakepesirup_subijinajelepu_newulewub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421339/normal_60368adba3708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419642/normal_60c1304842116.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407313/normal_60259634e9b1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_601cf199b01bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412570/normal_5fff7fb7260eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495843/normal_6007a28d57ca5.pdfIn PDF document text
    • https://pamukisap.weebly.com/uploads/1/3/4/7/134761215/ziseselatapid.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/690cce86-199c-4bc2-84c5-b2d274edf315/big_fish_grill_rehoboth_de.pdfIn PDF document text
    • http://gozuwef.pbworks.com/f/what_does_red_yellow_green_and_black_stand_for.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/reading_inca_history.pdfIn PDF document text
    • http://xizisimavi.pbworks.com/w/file/fetch/144540972/tafozamofejojatoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679a85ca-a20a-47f9-ab5f-72cbc4de4fc5/how_to_reset_a_biddeford_electric_blanket.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/f/xaratimexoripesufajanuru.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_off0000d561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD561 5620 bytes
SHA-256: 5d2f38748dcaf44c4402b509bab7b37532ce7b2d19368d1d1d65a88a03f019f6
font_01_sfnt_off0000e85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 11200 bytes
SHA-256: ec20da307abb2e39cf45e61676d7790bc608a50fc2661035d90d4fd044659f43

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