Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df37e8a86edf4f5…

MALICIOUS

PDF

76.0 KB Created: 2021-03-15 03:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3e7e6014515590750a6e9df87d2a8525 SHA-1: de28034af0ce0c929cb1fdcf64b2a02e0921c097 SHA-256: 0df37e8a86edf4f515e7aca85d4894e6e9293e14a8c285eef722b284054fa064
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The primary URL, 'https://xezojetit.ru/wix?keyword=job+simulator+apk+indir+pc', indicates a lure related to downloading software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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://xezojetit.ru/wix?keyword=job+simulator+apk+indir+pc PDF link annotation
    • https://sijaxidav.weebly.com/uploads/1/3/4/4/134499987/8844466.pdfIn PDF document text
    • https://tinonerapize.weebly.com/uploads/1/3/5/3/135349756/0907048e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415052/normal_603052ae4e4ca.pdfIn PDF document text
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/lasaba.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/242252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_60180b768a49b.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/shTljj6/78876875752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_60463f66ba082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454045/normal_603996ae972a1.pdfIn PDF document text
    • https://soresewo.weebly.com/uploads/1/3/1/0/131069968/wadavamagi.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiziluda/jcCljhh/gekeje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_5706221772f74528bbfa53adde217c4f.pdf?index=trueIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_9b83003b8bc84e448972a1e13558e7c4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/03e05ff1-49f0-4e87-aab8-468339d4485b/dance_music_80s_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1968e143-2d82-44f3-994e-274f28423c6f/dobimopojenozijorazivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9d0590-da68-4490-9273-e64ac1e320cb/how_to_fix_a_jammed_pellet_stove_auger.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_26f55a0a187640b59144ebd7be286806.pdf?index=trueIn PDF document text
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_675b3af0d2444efc86273143810db096.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE857 5412 bytes
SHA-256: 0fff95935cfd21a3b868d8af7c32e01b1044c249704cfbf3a4ed856691b43d05
font_01_sfnt_off0000faa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA1 12360 bytes
SHA-256: cc3ba82bda6ce095418616aacd414120de0bb86aaf06b5b635803eb1993760fa

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