Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6346eefabb12fe4…

MALICIOUS

PDF

80.9 KB Created: 2021-05-21 21:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f2bc651aea5432c1cdd0a05c726bcd44 SHA-1: 727b8aab5bae45a4c1af5f1dae1ba5f74a5446f7 SHA-256: b6346eefabb12fe4512d9ff8653ab7fb293fc30d14208265acb3440d2c8d0c40
186 Risk Score

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 0.9992

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://fokemale.ru/strik?utm_term=what+can+i+eat+while+on+phentermine PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366348/normal_5ffbf6ed4e803.pdfIn PDF document text
    • https://pirebuvix.weebly.com/uploads/1/3/2/7/132710697/kefuse_zopokegonek.pdfIn PDF document text
    • https://xipumizi.weebly.com/uploads/1/3/4/7/134746986/vokob-tifisi-vudaketifot-ronulisepi.pdfIn PDF document text
    • https://lotozuxefad.weebly.com/uploads/1/3/4/3/134316708/pulefotokawa-ximomimafupa-zokuwufomi.pdfIn PDF document text
    • https://gaxatibixowoki.weebly.com/uploads/1/3/1/4/131452935/2461371.pdfIn PDF document text
    • https://zowadadevifu.weebly.com/uploads/1/3/4/5/134597758/pemefij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_6044a7347c502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426960/normal_605f93ba75b2f.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/fuwewiweburup_tituvimozo_pimapovigumavo_nujivepuxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_6010b75103ae4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459034/normal_5ff69625c07ad.pdfIn PDF document text
    • https://guxipalun.weebly.com/uploads/1/3/1/8/131857363/voribofova_javepurejenuge.pdfIn PDF document text
    • https://lopomibuliwipa.weebly.com/uploads/1/3/1/3/131381919/zakanofivasimivupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_6019f22b69186.pdfIn PDF document text
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/gudaworav-solipunezi.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/nudovixake.pdfIn PDF document text
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/19891a89984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424682/normal_6024f1a214d14.pdfIn PDF document text
    • https://lijafaxad.weebly.com/uploads/1/3/5/9/135989690/4d2150.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/sufirumafuwekol.pdfIn PDF document text
    • https://vizodifoberesin.weebly.com/uploads/1/3/4/9/134900429/9781764.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/ea554df.pdfIn PDF document text
    • https://fenikazegalo.weebly.com/uploads/1/3/1/3/131379965/nezaloneninoguxev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04B 4888 bytes
SHA-256: 7c7727f1bf67fa58aa563adfdc51107eea5e4acd0703e197a3359481e74e193d
font_01_sfnt_off000100bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BF 11684 bytes
SHA-256: 080b7b6fb9c1708f477408b4b24c88f7ffbfa12d23c7555cb7c0a5971d95813f
font_02_sfnt_off000127cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361