Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf992b3ed1a4673…

MALICIOUS

PDF

118.3 KB Created: 2020-12-18 11:56:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 88f167e95cbb756b8cd0f3ac8d205857 SHA-1: 76b464032628afbe92a72bb000f48b7f69a06e88 SHA-256: eaf992b3ed1a4673697feee9a8ef6342cd9b4012d63da67593740d7d5bb59421
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, indicating it functions as a link farm for SEO purposes, likely to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

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://trafftec.ru/123?utm_term=external+part+of+a+tractor PDF link annotation
    • https://rugitaroginuwim.weebly.com/uploads/1/3/4/7/134768051/8089798.pdfIn PDF document text
    • https://mokogexikimowo.weebly.com/uploads/1/3/4/3/134321985/jejumopij-xanidipegozizat-tepevix.pdfIn PDF document text
    • https://xuzofetix.weebly.com/uploads/1/3/4/3/134371052/0f248a.pdfIn PDF document text
    • https://jezulusawuse.weebly.com/uploads/1/3/4/0/134000263/5cd28bd7d1b.pdfIn PDF document text
    • https://favurujovonelod.weebly.com/uploads/1/3/4/4/134435517/621caf862bb7.pdfIn PDF document text
    • https://rujemadatidugu.weebly.com/uploads/1/3/4/7/134747735/088a4.pdfIn PDF document text
    • https://wonenizawelob.weebly.com/uploads/1/3/4/3/134315845/wurojujo-lozolajerekevus.pdfIn PDF document text
    • https://botebagi.weebly.com/uploads/1/3/4/8/134870763/91c96fefc2.pdfIn PDF document text
    • https://givovirudodax.weebly.com/uploads/1/3/4/5/134587764/jomidubexugotuka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/21340529697.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfceb2c14dfd36feeb11ef/t/5fc0d713145a8629dcd099db/1606473491325/pasojezapomofekifabeximit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a7518651a04751993a6e/t/5fcc1424260a660a6bc96bd4/1607210020782/jataxubovanoluzuvomagutob.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/exalted_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/dayton_consolidated_school_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/betimugi/nipejilal.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_off00019327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19327 4856 bytes
SHA-256: e0701c7fd07132bf2015f815c29980bbe51bcfec5c80b60f6cacee0fc556afd6
font_01_sfnt_off0001a3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3C2 11820 bytes
SHA-256: 774225666fdf1a74eff4533264e1ca49cd53104efb9f138865e07ed32fc4210f

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