Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6b6027e1dc485d…

MALICIOUS

PDF

80.8 KB Created: 2021-05-23 10:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a45d054f4547e550f266cca4e6e2a29a SHA-1: 1fa49fcf548d38abe81784899c6c4d68b7c3e495 SHA-256: 6b6b6027e1dc485d7f0056200418ecd943a6031e74ba025aac45617b6aacac9f
156 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 0.9993

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 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.
  • 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://baarspo.ru/strik?utm_term=hills+feeding+guide+i%252Fd+cat PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388158/normal_603fe0bb847cd.pdfIn PDF document text
    • https://bezodidamivozel.weebly.com/uploads/1/3/2/6/132683328/5007239.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378607/normal_5fc623d590c9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383687/normal_5fcf59c19860f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494893/normal_6040785c849c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474978/normal_5fc671bd5bd22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_60290940b304a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423133/normal_5ff193b41cee5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408990/normal_5fd930b7a62c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5fd2ab628cf4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404113/normal_6030cc8007c1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489237/normal_5fdc334037aa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446400/normal_604a2d1076277.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412767/normal_606ad62288436.pdfIn PDF document text
    • https://rufeguduti.weebly.com/uploads/1/3/1/3/131384240/xawodifape.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369498/normal_5fce14f02f0ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491686/normal_6035bb34b3b23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413002/normal_60092a1c42624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501980/normal_606cb6998bca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460694/normal_60203685592dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366364/normal_5ff0ee3009f8e.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/d6184053-22a8-4079-9b34-ba84a3557eb3/how_to_fix_a_dvd_player_that_says_no_disc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/016e83c1-5be2-454d-93f0-5c8f7cd63758/can_i_build_an_app_without_coding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9555d1f-db9b-41c4-bc95-373a3978ae6b/litogutikabumito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/add5f9b0-7a29-4f18-b9b9-7752529df0d5/molozunolilaxe.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_off0000fe05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE05 5092 bytes
SHA-256: 1a6a91db2aba83c471b7094df4cfa079e12e2f545123b2229815ff2b77c25371
font_01_sfnt_off00010f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F79 11240 bytes
SHA-256: 52ea41c64fb169bbf6112e6d8fe2eb75eb835129a029e1d7042da952459288f8

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