Malicious PDF — malware analysis report

Static analysis result for SHA-256 175f18267ecea123…

MALICIOUS

PDF

72.0 KB Created: 2021-03-30 18:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 869c091f6092845affd9037f3a844cff SHA-1: 46408bbbda19b71036898f7be2b6488b582b2829 SHA-256: 175f18267ecea12398d9d91f33dc5ba4fdd89d14805dabc06d0ca50ca2faafcd
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO abuse. ClamAV detected this as 'Pdf.Phishing.Trojan', and ML classification strongly suggests maliciousness. While no scripts were extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns, likely initiated via spearphishing.

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://lozipotod.ru/wix?keyword=one+step+equations+word+problems+worksheet+6th+grade PDF link annotation
    • http://tk-pobeda.site/2006_cub_cadet_lt1045_starter3p4j9.pdfIn PDF document text
    • https://mijebekebune.weebly.com/uploads/1/3/4/0/134017127/binefifununaxe.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/roparudajevewedek.pdfIn PDF document text
    • http://morj.space/tidonosileveladimu96i.pdfIn PDF document text
    • http://shopwithsale.website/sekojiviginipulupolubij16yxt.pdfIn PDF document text
    • http://riwalimuj.scienceontheweb.net/6439958239.pdfIn PDF document text
    • https://kozuliwibiji.weebly.com/uploads/1/3/4/7/134705154/juzitexevujop.pdfIn PDF document text
    • http://punejew.mygamesonline.org/franny_and_zooey_salinger.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_09e57fcb51094b9c9d07630a3cda61d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/57401496471.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/best_logo_design_software_for_mac.pdfIn PDF document text
    • http://litorow.myartsonline.com/tulizinofolugepufo.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/39853246821.pdfIn PDF document text
    • https://92fbd7ca-8480-4723-bb2c-19523f9dca15.filesusr.com/ugd/29946e_26e0ef69e8b448e3b7770c74f616f5bb.pdf?index=trueIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_49f66c71d52d44ed8fbea69263ed3a07.pdf?index=trueIn PDF document text
    • https://69a7f268-727d-4112-ba4f-a3538cc856be.filesusr.com/ugd/9a0d60_486cafec10d649d0ac1d8b1953d3693a.pdf?index=trueIn PDF document text
    • https://90e68d66-75cd-4f9f-aa76-03b1e6b67b4d.filesusr.com/ugd/324cd8_eb387179e9e14d50a0f36a07786a4cfe.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_off0000d8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B8 5976 bytes
SHA-256: 476e9e4bb796465de603a07890352b73319b3bb5f5a63bbfffd4392ff63b7c60
font_01_sfnt_off0000ece5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE5 11112 bytes
SHA-256: 65e1e571eac0b4cba0c3e52bfbe66e7a8eb0079de69eebbf53a9a727b2d1b866

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