Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3b0031ba74677b…

MALICIOUS

PDF

79.4 KB Created: 2021-04-30 20:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f3ace7fe7fd767261645cffb5515ae0c SHA-1: 49c4569cf6369f1c71e400f7f18aba16b471da9e SHA-256: fb3b0031ba74677bb6b9beb8a1198ff882b5b0cd0786717514a85b23cd6259e4
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious and contains numerous external URIs, many of which point to disposable hosting domains. The document body, though heavily obfuscated, appears to be a lure disguised as a search result, directing users to potentially malicious websites. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the phishing and link-farming nature of this document.

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 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://seumenha.ru/strik?utm_term=how+many+quarts+of+oil+does+a+2003+jeep+liberty+take PDF link annotation
    • http://tuwukadinem.mygamesonline.org/17011905151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_60653c560d287.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/rx-a730_factory_reset.pdfIn PDF document text
    • https://cdn.sqhk.co/wexapitode/aiflSig/84172184338.pdfIn PDF document text
    • https://nowesepi.weebly.com/uploads/1/3/1/1/131164229/vuxemupajofu.pdfIn PDF document text
    • https://cdn.sqhk.co/lerutefo/Qiijepr/how_to_end_it_band_syndrome_fast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465907/normal_5ffd7c5aa9d77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376866/normal_605f53ee2930b.pdfIn PDF document text
    • http://zijukikov.mypressonline.com/sustainable_agriculture_definition.pdfIn PDF document text
    • https://judexesadizit.weebly.com/uploads/1/3/0/7/130738912/af210cc2cf9050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_6066026f4d57b.pdfIn PDF document text
    • https://cdn.sqhk.co/degamuwubela/b0ijjiZ/75602724290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453329/normal_5fe640fb54c76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455399/normal_6056b72cafddb.pdfIn PDF document text
    • https://cdn.sqhk.co/dojarodawiw/oCjgcig/star_trek_timelines_wikipedia.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/41300306247.pdfIn PDF document text
    • https://gelupolo.weebly.com/uploads/1/3/5/3/135314506/2576023.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/ygjdfGd/84676864288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417119/normal_605ca0c08d161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_613e36dc896247879d4f6e855e20a862.pdf?index=trueIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_3eebec349e0748b5ade7c340fe680712.pdf?index=trueIn PDF document text
    • http://jotudokizer.onlinewebshop.net/tosobi.pdfIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_b005028420bf4032842cfa52d1669fd7.pdf?index=trueIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_f6075e36fd624691b51aca87cdb645b0.pdf?index=trueIn PDF document text
    • https://5610d23c-e099-485d-ada5-1c5fec8f01b3.filesusr.com/ugd/97e063_54e7dffe192f44b9be0c499952479980.pdf?index=trueIn 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_off0000f36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36A 6184 bytes
SHA-256: a0f024e87d52ffa50b83e5633dd24ac4dd223b41789e5681b280eca2051f698a
font_01_sfnt_off00010867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10867 11516 bytes
SHA-256: b49a211e440584ff6396cd70ce86556c1842417c53c84827019fa53986a6abed