Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7413b71e5905a4…

MALICIOUS

PDF

78.1 KB Created: 2021-06-06 18:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 160e662aac3ee4a234c656a422612a2e SHA-1: ea6ef9df23dec23bf244a6f50a503d2a3c3acc60 SHA-256: 8b7413b71e5905a4b685757a1fb0f0762ab2a567c49ddb4d75a35e860b61a8fd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, indicative of a link farm, and was flagged by ML classifiers and ClamAV as malicious. The presence of embedded URLs suggests an attempt to redirect the user to malicious content, likely for phishing or malware distribution. The document's structure and numerous external links point towards a phishing or content-luring attack.

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 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://catamma.ru/pbw?utm_term=diy+sim-racing+cockpit+plans+and+templates PDF link annotation
    • https://biwezufum.weebly.com/uploads/1/3/4/8/134872286/vonene.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454575/normal_60018d7b05ba3.pdfIn PDF document text
    • https://waguwejulunesu.weebly.com/uploads/1/3/5/3/135301122/a35d24457d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408195/normal_5fed4b3bc8318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386334/normal_602ee52690c29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_606ca3a8477e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388048/normal_5ff563c4206a1.pdfIn PDF document text
    • https://piwoviwilo.weebly.com/uploads/1/3/4/3/134386066/2130857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_5fd24149d18d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_601677f4d1d56.pdfIn PDF document text
    • https://rofewonopanofav.weebly.com/uploads/1/3/5/3/135312507/joxun_tutuvefe_gozuki_xewagenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413345/normal_5fe8a630b9e3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465908/normal_6037a181976f9.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/946b42c5-f9da-4c8c-81e6-4f515afb8be0/the_argonauts_maggie_nelson_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6664381-1321-4c2f-b044-d318415e2b19/top_10_deadliest_days_in_american_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80dfb66c-54cf-46d0-ae25-f278aeb7b43c/little_fires_everywhere_book_ending_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0d56f42-bfac-4b35-9f43-710605e651c8/kadiwijalijiwego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edc90402-b4a7-4d06-bf57-cb23a708a99f/significado_de_palabra_languideciendo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc688f8f-4cb1-415f-ba8b-c8c224b42357/86936553173.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_off0000f1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F8 5592 bytes
SHA-256: 429f5a246244b1b41094b682ed9082a54fcdfb98bcd282d9114618b299df66ce
font_01_sfnt_off00010505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10505 11296 bytes
SHA-256: da636d68a9ea50715d52b303379b31eaabd106e3ef251d6e5980285513d154ae

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