Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1852913f5e94176…

MALICIOUS

PDF

60.0 KB Created: 2021-02-11 04:16:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: faaaf847e80c87cb16a387d4e530ae5d SHA-1: 07cf5c6f52ad49aa6b1b4bdda272b268a6e9c1d2 SHA-256: c1852913f5e9417690db8fba18cfd6abf64eaa7dd84ad4d4119b4c54107505f9
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('druttle.ru') and another to a link farm ('italywom.space'), suggesting it's designed to redirect users to malicious sites. The presence of PDF-specific link farm heuristics further supports this. No scripts were extracted, but the overall structure and URL distribution point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/123?utm_term=2k17+download+apk+free PDF link annotation
    • http://italywom.space/advance_directive_form_njuzjym.pdfIn PDF document text
    • https://fixefukazadutux.weebly.com/uploads/1/3/1/6/131607703/7622861.pdfIn PDF document text
    • http://keysecret.ru/gazanuzgod2.pdfIn PDF document text
    • http://nigasheff.xyz/90778798116i2f5r.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuniruf/fYjajer/7442517839.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://difedomuki.epizy.com/facebook_mac_air.pdfIn PDF document text
    • http://natadomemorad.epizy.com/reflection_over_y_axis_worksheet.pdfIn PDF document text
    • http://tosuniwenalob.epizy.com/kotubesuduvabuw.pdfIn PDF document text
    • http://kejarajavamoge.epizy.com/98895024883.pdfIn PDF document text
    • http://tikobonojaxax.epizy.com/14014649681.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/company_profile_format_for_air_conditioner.pdfIn PDF document text
    • http://vazorilumi.epizy.com/korean_ginseng_chicken_soup_michelin_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB21D 5184 bytes
SHA-256: 5dbd969e053455bfa18af96db46fd113db3b28ed9bfaf6550f831517fcd783a7
font_01_sfnt_off0000c3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F3 9212 bytes
SHA-256: fdbbbda92173304c523d502fcf30028b7e22b8ae232ef0e327e40497a3d3d8ab

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