Malicious PDF — malware analysis report

Static analysis result for SHA-256 df7f69c6b6acd7bf…

MALICIOUS

PDF

76.0 KB Created: 2021-03-20 02:05:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f54e829e630314e9e548e73224977a0f SHA-1: b12cbe03eca054002a378861970d957ca864919c SHA-256: df7f69c6b6acd7bf7588acbce59195ee665bc82e37b09805b37f0c8e148ba245
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, forming a link farm, with one prominent URL being `https://soxebez.ru/strik?utm_term=what+countries+are+below+the+tropic+of+cancer`. The presence of a link farm suggests an attempt to manipulate search engine results or to host potentially malicious content on numerous disposable domains. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=what+countries+are+below+the+tropic+of+cancer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488581/normal_6051851d1bc17.pdfIn PDF document text
    • http://it50off.pro/tirukibagirudobibwtgrc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407749/normal_5ff5175562668.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/95835196589nw9z5.pdfIn PDF document text
    • http://ponexikid.22web.org/how_do_i_program_my_verizon_remote_to_my_samsung_tv.pdfIn PDF document text
    • https://nagewapebikex.weebly.com/uploads/1/3/4/6/134647925/kunixurulug.pdfIn PDF document text
    • http://waxinexedodupij.22web.org/biruxijudozimalowokum.pdfIn PDF document text
    • https://kavusataru.weebly.com/uploads/1/3/5/3/135314949/vamofumepe-juwas-domujodad.pdfIn PDF document text
    • http://svoylend.xyz/684507524243l3h4.pdfIn PDF document text
    • https://retelajipubo.weebly.com/uploads/1/3/4/7/134700068/6055290.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_cae2350b98154c94a95f50a91fdc6d31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kujapomib/hollywood_a_movie_free.pdfIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_9b9c60ec083443fa906164bf5370ba1c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/gezinojaxo.pdfIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_a866ddaf49644af292c4498782775354.pdf?index=trueIn PDF document text
    • http://volitig.rf.gd/beeruva_movie_songs_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/diabetes_treatment_guidelines_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/71656940394.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_0acc3c7d92e143a2a4c042cac3c5d833.pdf?index=trueIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_ec8896d96b214b0d81ec97f16266fff0.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_off0000e964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE964 5348 bytes
SHA-256: 26aabfa8194fe5df0d94692f5465ab8d1760e8e362c0f4a416c4a35d38711571
font_01_sfnt_off0000fba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA4 10928 bytes
SHA-256: 004f12aca24d471cd676c760a6d12bf72292e6b54dc24ad5ba0b498659049673