Malicious PDF — malware analysis report

Static analysis result for SHA-256 017f97fe7a9f64e7…

MALICIOUS

PDF

74.5 KB Created: 2021-03-07 22:55:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6e7184ff6a72947901f5eb5379c7112a SHA-1: 052fbdce99c16ca53547a9f1d9f1c27cb4ec6a44 SHA-256: 017f97fe7a9f64e72e7be370e8065f62b69f4b23bee4adbd829737edfcd04f5e
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, with a primary URL pointing to 'https://lozipotod.ru/wix?keyword=red+boiling+springs+library'. Heuristics indicate this is likely for SEO manipulation or to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=red+boiling+springs+library PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500444/normal_601004374d0e0.pdfIn PDF document text
    • https://sivoroxusakigob.weebly.com/uploads/1/3/1/4/131453081/jupabufiwawurupewu.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/kaxukajidemosixar.pdfIn PDF document text
    • https://peruvapi.weebly.com/uploads/1/3/0/8/130813059/megozefil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465249/normal_601658e1e336f.pdfIn PDF document text
    • https://wagigezo.weebly.com/uploads/1/3/0/7/130775958/9423624.pdfIn PDF document text
    • https://butevexonukuzi.weebly.com/uploads/1/3/2/6/132681970/9111048.pdfIn PDF document text
    • https://xolesozetenosox.weebly.com/uploads/1/3/1/0/131070434/dujejujaxuvokaful.pdfIn PDF document text
    • https://wejobufobugof.weebly.com/uploads/1/3/5/3/135348322/rikigigagidakiz.pdfIn PDF document text
    • https://jumufewaxijakuk.weebly.com/uploads/1/3/1/3/131380308/sakulovu.pdfIn PDF document text
    • https://baduripafab.weebly.com/uploads/1/3/4/6/134623558/3126185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_603e61410c16e.pdfIn PDF document text
    • https://tekeginisexufu.weebly.com/uploads/1/3/1/3/131381150/kosuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/firudegix/csi_new_york_season_13_episode_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eaa37f6-bf1a-4699-a9df-035ea82b4a9d/46005072207.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/comptia_linux_xk0-_004_certification_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621e7a37-1cf9-4ee4-b43f-cd992c4a56a3/dijitenukel.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_92a985511e8f4523b45554a582f91301.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70f8f82e-f7e0-4cfd-bdd4-ccc8611607bb/how_to_interior_design_my_own_house.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/performance_guarantee_vs_letter_of_credit.pdfIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_5b6227f08b3543b3947a66bc50034c42.pdf?index=trueIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_af9e733a18ea4b978c46b14167219d9d.pdf?index=trueIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_9e049fbe3eda4983b815d0bddd15c573.pdf?index=trueIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_64b44fff0b5c466dae24f78f666f207e.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_off0000e5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E8 5376 bytes
SHA-256: 4c13c6b54e53acce3f80a489dcd4bf8090e237b4c6748db029c8504748bca83f
font_01_sfnt_off0000f844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF844 10696 bytes
SHA-256: 4e0f01c35e2c46df36ad5771249180e56df4ccaceb29fc9e93216e2f53ba1b82

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