Malicious PDF — malware analysis report

Static analysis result for SHA-256 09656fdca6c6ce8a…

MALICIOUS

PDF

82.5 KB Created: 2021-05-18 00:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17280b67dc43e6b502e228710c74355b SHA-1: ec44a05541e5b8790631ff4a9651279f33b30ad8 SHA-256: 09656fdca6c6ce8ae79f3bee80dcf5aca2da91ff0de21112fe5c43eea33d0ed3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the heuristic firings suggest the document is part of a campaign to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=malm+single+bed+with+drawers+instructions
    • https://cdn-cms.f-static.net/uploads/4448719/normal_604f851576709.pdf
    • https://xogukozatakik.weebly.com/uploads/1/3/1/4/131453421/wozafituritukudi.pdf
    • https://static.s123-cdn-static.com/uploads/4474475/normal_5fc87a4be1f17.pdf
    • https://cdn-cms.f-static.net/uploads/4473640/normal_6021be418b4e6.pdf
    • https://cdn-cms.f-static.net/uploads/4454984/normal_605d93f35ef96.pdf
    • http://kufadudaz.iblogger.org/15193049954.pdf
    • https://cdn-cms.f-static.net/uploads/4418970/normal_603d514a2b84f.pdf
    • https://tafifomoku.weebly.com/uploads/1/3/1/8/131856516/waragegijofufik.pdf
    • https://static.s123-cdn-static.com/uploads/4504788/normal_5feeb6e00d74f.pdf
    • https://cdn-cms.f-static.net/uploads/4393041/normal_605fe2653efda.pdf
    • https://static.s123-cdn-static.com/uploads/4494138/normal_5fc5db88be0de.pdf
    • https://cdn-cms.f-static.net/uploads/4392647/normal_6018f6c7ecc81.pdf
    • http://gabojodidi.iblogger.org/ginofiribajavezosep.pdf
    • https://cdn-cms.f-static.net/uploads/4492536/normal_602645510f5e1.pdf
    • https://cdn-cms.f-static.net/uploads/4401525/normal_601df354d0382.pdf
    • https://wisetigu.weebly.com/uploads/1/3/4/3/134357320/nekibex.pdf
    • https://lewofadexireg.weebly.com/uploads/1/3/4/8/134868993/gekit_goludimuta_jirib_dojalabe.pdf
    • https://cdn-cms.f-static.net/uploads/4450504/normal_5fdc3fbba5e8d.pdf
    • https://cdn-cms.f-static.net/uploads/4505326/normal_601628bf628c7.pdf
    • https://sarurudadolixo.weebly.com/uploads/1/3/4/6/134644817/5825458.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jonizuxupofewow.rf.gd/88925218081.pdf
    • http://jemowefodidalo.rf.gd/fly_fishing_setup_for_trout.pdf
    • http://kakoxoduruze.epizy.com/degumazizixawovejobega.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100c1.bin
4bdbcf1c6bcd25d77c29e6402b00466bc66ad879906d0f25436f67201abe6040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100C1 5588 bytes
font_01_sfnt_off000113b2.bin
2412fc1db8a35631836c7b873eeeba0b402b982752971ae41274a3cd962e0919		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113B2 12168 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.