Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d98c168277616b…

MALICIOUS

PDF

85.4 KB Created: 2021-02-23 00:51:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c0e9200b0d22e6c113c7cf06a061b4b5 SHA-1: 283d2b2ea4a882e484e9155464a80dc2378e2118 SHA-256: 05d98c168277616bfe7572bfd5838c2698da44b2b9c6cce299eff0a1e15278a7
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains keywords related to software downloads, likely intended to deceive users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=sketchup+3d+warehouse+free+download+2015 PDF link annotation
    • https://taresazafo.weebly.com/uploads/1/3/5/3/135335901/sovupidivazu.pdfIn PDF document text
    • https://ziloxewimufe.weebly.com/uploads/1/3/0/8/130813797/noginaxunumodor.pdfIn PDF document text
    • https://zirejuvisipaz.weebly.com/uploads/1/3/1/6/131636922/furuti.pdfIn PDF document text
    • https://poliradu.weebly.com/uploads/1/3/5/9/135991332/kiruganewivomi.pdfIn PDF document text
    • https://pojalurerisufi.weebly.com/uploads/1/3/4/1/134109142/duzepobidejidobube.pdfIn PDF document text
    • https://borobufa.weebly.com/uploads/1/3/1/4/131406827/4268463.pdfIn PDF document text
    • http://bostpolamos.site/80162053802wer4l.pdfIn PDF document text
    • https://dovenokitumenu.weebly.com/uploads/1/3/1/4/131482991/8a75563.pdfIn PDF document text
    • http://kieverts.xyz/comcast_email_settings_for_androidu6wja.pdfIn PDF document text
    • http://picsonair.com/mutuladujekipimhww1p.pdfIn PDF document text
    • https://wakejowedab.weebly.com/uploads/1/3/4/5/134599651/5914393.pdfIn PDF document text
    • https://nofodomeki.weebly.com/uploads/1/3/1/8/131871852/124143.pdfIn PDF document text
    • http://evatopshop.xyz/instagram_layout_templatezf6k9.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/i_can_read_system_thailandyi3oe.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
    • http://ziriboxemo.epizy.com/best_adblock_apps_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/34857677046.pdfIn PDF document text
    • http://novotufimaxanu.epizy.com/certificate_of_conformity_new_york_sample.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA5 5952 bytes
SHA-256: 3fe0caa15900959e685ffbc19c000c4d33b823ec6df0b925788a729ae8d4dfb7
font_01_sfnt_off000113f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F6 11368 bytes
SHA-256: d5c08d3a5f4669a348695d56d987a44d6b9a8f981331cd0bb51fdc6a7a5365c9
font_02_sfnt_off00013a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A67 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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