Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6ee76d8435d2d5…

MALICIOUS

PDF

106.3 KB Created: 2021-04-10 10:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3b04a735c7dacd734ba9bb60f2fa9181 SHA-1: 8bd6a31e26d1e02b8e305c0da438930d6ff6f347 SHA-256: de6ee76d8435d2d559cdaca3756066b4c5f360b6c1747d90b7d5dd818242fa10
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://gimoguvi.ru/strik?utm_term=onan+generator+4kyfa26100k+parts+manual PDF link annotation
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/6310972.pdfIn PDF document text
    • https://vosovijuz.weebly.com/uploads/1/3/0/8/130813614/d5aa11.pdfIn PDF document text
    • https://pewuwokajop.weebly.com/uploads/1/3/0/7/130775265/b58d871d9.pdfIn PDF document text
    • http://leree6.club/bollywood_movies_list_2018tkic5.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/7e3073f4c.pdfIn PDF document text
    • http://slampochka.ru/xejeruwameb2cv1l.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/muNgip0/6703063244.pdfIn PDF document text
    • http://ogranicbio.fun/how_to_get_the_gerudo_set_in_breath_of_the_wild5o8x9.pdfIn PDF document text
    • http://tehnotop.site/66917651587etf09.pdfIn PDF document text
    • http://testrun.ru/50967728809g3s04.pdfIn PDF document text
    • https://cdn.sqhk.co/fomezawelud/SgehjV5/how_to_make_cartography_table_minecraft_1._14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_fbceb587c47247a4b0a0704424e0cbe7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/muxoroz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e09877f-aa2d-48a5-a2b4-6998e83878c9/dupovozetugexedeju.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/safojuwerisifamalibaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f76b2c3-c1de-4e2f-8345-d7fcfa635565/93289178163.pdfIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_d5e5ff42515f4b3cabbd9c6ac2c1a1a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizufapu/guditipedezaxopepur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9201f89d-279a-4cf6-a8b8-afd38849af84/79437753674.pdfIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_a3760b82af744d9e987cc27c25bafb96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wunojipu/3614005490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe0e871a-c6c1-42ab-a1c1-d0f05c9712ec/kitexufurixof.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/fizijazezunarekowixokep.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_off000162c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162C6 5980 bytes
SHA-256: f3f179603ec415bd47116ae203c1f2409c228ac55133a2941adad2babdf7974d
font_01_sfnt_off0001772b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1772B 11012 bytes
SHA-256: 8cca3dfd127e137967a5e77e42e354c71b13dd2573ad0175497c7f77df6fa89c

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