Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a135602ae80488…

MALICIOUS

PDF

82.1 KB Created: 2021-04-11 16:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 9f43c9da5b809767ffb1ae3e82f16cfb SHA-1: fa2fda3fa09024a786aa48ccc18b45f5415cece6 SHA-256: 06a135602ae8048816172c12c7e67456d964951698e5a2aa05dc160578850860
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, many pointing to disposable hosting, suggesting it's part of a link farm designed to redirect users to potentially malicious sites. The primary URL identified is https://leonvi.ru/strik?utm_term=what+size+is+the+new+yorker+magazine, which is likely used for phishing or malware distribution.

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://leonvi.ru/strik?utm_term=what+size+is+the+new+yorker+magazine PDF link annotation
    • http://rosipazuzesuzos.iblogger.org/kibodigiropikavaxaf.pdfIn PDF document text
    • http://ctuxuu.com/64802215081i52g8.pdfIn PDF document text
    • http://inglassrus.ru/the_bell_jar_sylvia_plath_meaninghthgr.pdfIn PDF document text
    • https://zowadadevifu.weebly.com/uploads/1/3/4/5/134597758/rifemase-wafevum-wedipow-porifelimutebij.pdfIn PDF document text
    • https://mobasukirogejus.weebly.com/uploads/1/3/1/4/131453019/venozufu.pdfIn PDF document text
    • https://gikanusubidi.weebly.com/uploads/1/3/4/7/134756500/zilaniporaduxu.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/7201364.pdfIn PDF document text
    • http://ionatr.fun/87823895261g4vu6.pdfIn PDF document text
    • http://vuvuga.xyz/84384243372hy5fe.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
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_0246401e1cbe4474a01d5d51e146d1cd.pdf?index=trueIn PDF document text
    • http://vegefosapol.rf.gd/79946088357.pdfIn PDF document text
    • https://b1fdf235-84a1-4479-ba44-7fc4a4f983d7.filesusr.com/ugd/afcd87_757239fee63b47398b5899c0052a0293.pdf?index=trueIn PDF document text
    • http://jumerajoge.epizy.com/10195198330.pdfIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_37c16eef06cd43e595da2cd380244a9f.pdf?index=trueIn PDF document text
    • http://vifebekomese.rf.gd/pdf_file_convert_to_excel_video.pdfIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_4a9bc5eef5254efbabfe4818ce6a6ee0.pdf?index=trueIn PDF document text
    • http://vesijugi.epizy.com/pisisexuxefamevu.pdfIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_f480bbb2d6a24555ba9807528d03c26e.pdf?index=trueIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_2a94ff5a9ab94e80aeed0733327975cf.pdf?index=trueIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_c06e845816714aca9eab597434d3aea0.pdf?index=trueIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_2d9a127291b24cad9c8242356e0373e2.pdf?index=trueIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_6352a600f11246ef8f2dd6752fedfd2c.pdf?index=trueIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_b211e9025dc4451fb27bf9dbd93e801a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 5176 bytes
SHA-256: ffb1b6fc0f52c27bbb8bfb0c538159c853137fae5c4c6c32461575696d91a54f
font_01_sfnt_off00010489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10489 11908 bytes
SHA-256: 88afdcdcfb2bc7a5d76153f08ad5472615d52058bd8659e50e4eaccfd2d760e2
font_02_sfnt_off00012c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C77 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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