Malicious PDF — malware analysis report

Static analysis result for SHA-256 6962a450712f1e85…

MALICIOUS

PDF

104.6 KB Created: 2021-04-03 22:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5110bc0e943ff11e51b63f38d2b62d8b SHA-1: ee37f95913c2eae14855f58d79b7150e358017b4 SHA-256: 6962a450712f1e85fdc0b407118be5bca9d6c1432f8ac12a402e957e65e73ab1
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://seumenha.ru/strik?utm_term=what+is+polar+or+nonpolar+solvent PDF link annotation
    • http://lazujifoxupa.getenjoyment.net/how_to_get_more_heat_out_of_a_wood_burning_stove.pdfIn PDF document text
    • http://peuly.xyz/senokoxegujoxaxujazulbdaoq.pdfIn PDF document text
    • http://pobadabodoz.scienceontheweb.net/drawing_human_anatomy.pdfIn PDF document text
    • http://conicppjry.bid/vowinigowfycn4.pdfIn PDF document text
    • https://dafavazama.weebly.com/uploads/1/3/4/8/134893815/wofefivixep.pdfIn PDF document text
    • http://greenbike.shop/41917030228fi0mo.pdfIn PDF document text
    • https://mibigadoguful.weebly.com/uploads/1/3/4/7/134759919/vusexapebexulupego.pdfIn PDF document text
    • https://jutokikifugata.weebly.com/uploads/1/3/1/0/131070124/zujeze.pdfIn PDF document text
    • http://copyright-rules-help.com/before_you_accuse_me_ccr_bass_tabo9l7m.pdfIn PDF document text
    • http://kapusta.pro/18823085174rijko.pdfIn PDF document text
    • http://organicnu.info/58555085062vsh82.pdfIn PDF document text
    • http://instapodarok.site/19675427809kdz2y.pdfIn PDF document text
    • http://strgb2.ru/19293205452p5b4g.pdfIn PDF document text
    • https://vugawijop.weebly.com/uploads/1/3/4/5/134594760/5587874.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/piwanisaj/89524967035.pdfIn PDF document text
    • http://titugol.atwebpages.com/lixegejowizutiwiwabo.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/email_template_builder_github.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off00014784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14784 6492 bytes
SHA-256: cf6bcbaf462759e04676f8989e7e87ed4d43c4317550ddbd0c5684ab0bd17b73
font_01_sfnt_off000157b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157B8 4980 bytes
SHA-256: 613521d081ed18757f0775ecf64c6c01f52808eef2c74f9c989bbea4daf30e3f
font_02_sfnt_off000168b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168B2 13372 bytes
SHA-256: 61d5823f937e91b42240a9d557692e0b1b37defb8199a7cb9375561528aefa56

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