Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f7cee8a765e766…

MALICIOUS

PDF

87.9 KB Created: 2021-03-21 10:15:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7fad42862cf0be4860ba5d93216f62ec SHA-1: 930eebcf684e5e0b10d45b1e7d8dc4141c77629c SHA-256: 67f7cee8a765e766c5bed91effc7757374dee1be0bc9832df4f19d7b2ab663b0
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 0.9993

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 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/award?keyword=motorboating+merit+badge+pdf PDF link annotation
    • http://ekzo-fruit.ru/gigifaal7jg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458854/normal_6008b5701a1fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486523/normal_6019bbc06c362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463560/normal_603e6c65a0149.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/iaiitgf/22950854431.pdfIn PDF document text
    • http://presente-top.store/214324732990sbsd.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaluwozez/igixha5/recette_sandwich_poulet_et_canneberge.pdfIn PDF document text
    • https://cdn.sqhk.co/savekedeg/ieVvMhW/13576104680.pdfIn PDF document text
    • http://italiahot.fun/jijarijomerokuzonotosodobwmfl.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/hhQYkBY/11170592804.pdfIn PDF document text
    • https://cdn.sqhk.co/janurisu/dgihdNv/5093441824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469355/normal_604a109fedb6f.pdfIn PDF document text
    • https://cdn.sqhk.co/kinubowa/dgieZhO/85186081337.pdfIn PDF document text
    • http://mp4.design/what_is_my_dpd_parcel2x5m6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421788/normal_5fd89c47b865a.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/93cb5e7d-337e-4865-85c2-cecdb15b3650/fukemafibimatigodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c288fb6-7b68-49e1-8e76-78f8e150aced/20007303031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68a6e290-8d91-4561-99dc-84b09edfaec9/master_forge_electric_smoker_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c1ca70-f3e4-42b4-b786-964abd2b5fea/jireretamulebiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1866c0-1fab-4673-8412-a992daf85296/interview_questions_about_ethics_and_integrity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c869c41-0aae-41e8-b26e-407c8e516dd7/gadujanalebupixubefidiram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c917b5-1cf7-4845-96ac-b388d7bcb4b3/54534749038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0758a4cd-2435-47c2-9a73-379e11a197f3/6095872989.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11698 5296 bytes
SHA-256: 9dd3dfab13afa7ad4d39968eb23c925a0e93c865d839961f52a94c9304867ec8
font_01_sfnt_off00012890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12890 11960 bytes
SHA-256: 5cbc2363a499e841c1b246c4ec1d3f0e66e0d7a1a252c0ad4b0d35f9c5a8d5a3

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