Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ae7cb102ee161e…

MALICIOUS

PDF

77.9 KB Created: 2021-06-07 15:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 19470503d8b6303b46af589eccd736a4 SHA-1: eeea5b0b74a069b85d40db8694fd4d7af0ac1d1d SHA-256: f6ae7cb102ee161eb2bb5a55d83c2d57a4f32e5629ac0314c9eb06bc35fd9ca9
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a tactic of redirecting users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://smidgel.ru/pbw?utm_term=who+would+win+orca+vs+great+white+shark PDF link annotation
    • https://nigelatadumave.weebly.com/uploads/1/3/4/6/134615228/3116114.pdfIn PDF document text
    • https://jitavemalidev.weebly.com/uploads/1/3/1/8/131871699/6b46c619045.pdfIn PDF document text
    • https://bezodidamivozel.weebly.com/uploads/1/3/2/6/132683328/soxesusup_kenaladifoxagoz.pdfIn PDF document text
    • https://vavawuzozut.weebly.com/uploads/1/3/1/1/131163550/gokubili_runafono_pilikur_fozid.pdfIn PDF document text
    • https://sixisamut.weebly.com/uploads/1/3/5/3/135308299/43936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481831/normal_6036f640b5ddf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459921/normal_60b988022e6b4.pdfIn PDF document text
    • https://gujexewemozi.weebly.com/uploads/1/3/1/8/131856271/e0e60f5895a578.pdfIn PDF document text
    • https://nelodukes.weebly.com/uploads/1/3/6/0/136085721/kugos.pdfIn PDF document text
    • https://zomanuvid.weebly.com/uploads/1/3/4/4/134477829/d1c71.pdfIn PDF document text
    • https://netajowazowu.weebly.com/uploads/1/3/4/3/134325029/lomematewowub-tufivozuzi-fiwulivozitof.pdfIn PDF document text
    • https://menelaxewo.weebly.com/uploads/1/3/4/3/134362368/8f3dad75b79e.pdfIn PDF document text
    • https://divevuke.weebly.com/uploads/1/3/3/9/133999966/zipeda.pdfIn PDF document text
    • https://fataleripe.weebly.com/uploads/1/3/0/9/130969718/9212601.pdfIn PDF document text
    • https://mufudenufasos.weebly.com/uploads/1/3/4/4/134492520/loxopanajon_dafusoroli.pdfIn PDF document text
    • https://giduzuzetedeze.weebly.com/uploads/1/3/4/8/134853145/xanos.pdfIn PDF document text
    • https://febadezupuwile.weebly.com/uploads/1/3/1/0/131071278/medaginagajesu.pdfIn PDF document text
    • https://xukoxaxap.weebly.com/uploads/1/3/4/7/134748194/vitinifowububo_nufavibava_toxorujasiza.pdfIn PDF document text
    • https://rujapunilibufig.weebly.com/uploads/1/3/4/7/134713438/6757247.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381529/normal_5fee7dd7398d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kokoxudalux.pbworks.com/f/cuadro_comparativo_estadistica_descriptiva_e_inferencial.pdfIn PDF document text
    • http://wixugigir.pbworks.com/w/file/fetch/144460998/rivunenirom.pdfIn PDF document text
    • http://mosijiv.pbworks.com/f/59481344600.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/f/bugofidonupo.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/w/file/fetch/144468453/67678911279.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_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 5428 bytes
SHA-256: 16c67a36980c3ddfd25818aa9c0a7b32e2a514bad9140d54b152cf444ef7c2a2
font_01_sfnt_off000104d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D5 10896 bytes
SHA-256: 081485c04a676f9634c5067426bc8f34069279be984882b8a08cfdbcccf2a7a5