Malicious PDF — malware analysis report

Static analysis result for SHA-256 3daf3d94c22f8505…

MALICIOUS

PDF

81.0 KB Created: 2021-03-10 09:26:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 92e212952b2f450dbf3feb02628272f8 SHA-1: d1e3bf13e406391caf23d9f43d62f9314dcdc9c7 SHA-256: 3daf3d94c22f85057cf1c7199b49e8a885f591d34aeacb30ba34c213ace5abdc
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain product-related text, likely a lure to disguise the malicious intent of directing users to external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/strik?utm_term=sennheiser+ew+100+g4-me2%252F835-s+1g8 PDF link annotation
    • https://pedidifapa.weebly.com/uploads/1/3/0/8/130874671/mozijenobezova_kakodel.pdfIn PDF document text
    • https://wosexepipoto.weebly.com/uploads/1/3/5/3/135347387/dd3511193.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/0ggjc7P/38616258616.pdfIn PDF document text
    • https://cdn.sqhk.co/sunaxidida/Zd8gd8p/36196733719.pdfIn PDF document text
    • https://joxetoxuluf.weebly.com/uploads/1/3/4/3/134391367/somakefovola-demuzapetetidop.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/jexicji/wheel_size_calculator_bicycle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387565/normal_600e7b481d5b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388614/normal_600622f054831.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444885/normal_5fddb32a01877.pdfIn PDF document text
    • https://turexebino.weebly.com/uploads/1/3/4/2/134265835/vesefifofujemoz.pdfIn PDF document text
    • https://jabuzowe.weebly.com/uploads/1/3/4/3/134312688/99f1a18020850.pdfIn PDF document text
    • https://bipagaposelugi.weebly.com/uploads/1/3/4/4/134479594/856dba9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499629/normal_5fec43930dc89.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/6RgcLja/hackers_falls_weather.pdfIn PDF document text
    • https://kelogukagikuval.weebly.com/uploads/1/3/0/7/130739039/lefezoxifufeba.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/hfjdd3L/mirorini.pdfIn PDF document text
    • https://kixuvatapowow.weebly.com/uploads/1/3/1/3/131383305/9590882.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://591379ed-26d0-4405-baa7-5b8dadede013.filesusr.com/ugd/866ffa_88057454228f48b99e649b18307fa779.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/atmosfera_zumthor.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_83409930ba1c47408c0f2201be67aebf.pdf?index=trueIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_a9bf65c09d88419281ff3974defe3f2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/apowermirror_android_crack.pdfIn PDF document text
    • https://e1bd05e7-a2ed-43df-b5fc-9bc8ee0b1a84.filesusr.com/ugd/08acf3_a6e4f0229ae74f0aab16fe55cfe3f401.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/fivogesafivuvemupoweloteg.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDB 6016 bytes
SHA-256: 24d754cb37253503d8082f10e4ec3a15d685bf3323ffcd1947d7db81c77b0f01
font_01_sfnt_off00010256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10256 2044 bytes
SHA-256: f56b0298392e275c109a0b32a541ca4ea7103d2c833af441416bc0960d073f4b
font_02_sfnt_off00010b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2F 13436 bytes
SHA-256: 7fca133648b7b25f9439b1e36cbd78e0b94820517a58698659dcc680d531b0fd

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