Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c27b764fc03c4e…

MALICIOUS

PDF

79.6 KB Created: 2021-03-16 22:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a77deabcc8a5fde94f02d39fc4d9f72f SHA-1: 52822688191514bc38b1d187f9ef4eb9c211ccbd SHA-256: f4c27b764fc03c4ed63c592041d2af4061fbc5984d76b8c1d3d36dd9139dcc3d
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure, possibly disguised as a user manual, to encourage clicks on these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=motorola+moto+g+3rd+gen+user+manual PDF link annotation
    • https://kobuwejen.weebly.com/uploads/1/3/0/8/130873730/eea92cd39.pdfIn PDF document text
    • https://takibuvekinapix.weebly.com/uploads/1/3/4/4/134456834/be8004546fcf30.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/types_of_cells_formed_in_mitosis.pdfIn PDF document text
    • http://furofosozunonew.22web.org/fufonizuvopetuxuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_6050366fc349b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_60382fa521c73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415327/normal_5fdcf9c42f788.pdfIn PDF document text
    • http://kexufiloruruki.22web.org/95104448703.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/14118111172.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/the_power_of_now_by_eckhart_tolle_summary.pdfIn PDF document text
    • https://lobejimore.weebly.com/uploads/1/3/1/3/131383478/7b3c8d1244dba52.pdfIn PDF document text
    • http://ranomurivokav.22web.org/sudelojorenujapasideron.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406464/normal_5fdeb54f75e16.pdfIn PDF document text
    • https://tevipane.weebly.com/uploads/1/3/2/6/132681072/kezupowu_powotumu.pdfIn PDF document text
    • https://liwifaxuje.weebly.com/uploads/1/3/0/8/130874244/2f610bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392195/normal_5ff09621d90ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425910/normal_5ffe1b12c89e3.pdfIn PDF document text
    • https://lifulufo.weebly.com/uploads/1/3/1/3/131379971/samowoji_zalebagosixi.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/management_of_hypertension_british_hypertension_society_guidelines.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mawarine.epizy.com/free_compound_words_worksheets_for_1st_grade.pdfIn PDF document text
    • http://naxamuj.epizy.com/dutowuru.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_off0000e561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE561 3724 bytes
SHA-256: 59701ab6f1a8c012dd8ec870d317e4651c2abf9fe53e1fa5cdcb5946a55c7908
font_01_sfnt_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 5316 bytes
SHA-256: 276079af2b144b92276fef7209c288946ea7e80f58a006b7382ad98665da0dec
font_02_sfnt_off0001049c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049C 13528 bytes
SHA-256: 51bd4e1c8b4bddaaee15d4afc2292eef49127a2d726537e64e1f1682e0c8ac07