Malicious PDF — malware analysis report

Static analysis result for SHA-256 71915a2e684e038c…

MALICIOUS

PDF

80.5 KB Created: 2021-03-17 13:14:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 428742046c5fab41922c28c9eebd5961 SHA-1: 16a8d75fa0b33fe8885fcba8bb90cc84dbd150bb SHA-256: 71915a2e684e038cb536a373742417d4c23340bba8af50f485782ac286ccbdca
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or redirection scheme to distribute malware or conduct phishing. The document body, though heavily obfuscated, contains references to 'bully lite mod apk', indicating a lure for potentially pirated or modified software.

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://vilenefex.ru/123?utm_term=bully+lite+mod+apk+gtatrik PDF link annotation
    • http://gedawirij.66ghz.com/83107076334.pdfIn PDF document text
    • http://pusulij.22web.org/abandono_animal.pdfIn PDF document text
    • http://fisogik.iblogger.org/18319732367.pdfIn PDF document text
    • http://zivozariwusa.22web.org/71271761546.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494429/normal_6017b701beb5e.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/gcwVYoY/85606134339.pdfIn PDF document text
    • http://fuxarirudutosas.iblogger.org/cell_biology_crossword_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/8NvwDnS/gw2_elementalist_build_open_world.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/fmg2ktr/78534821697.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/Gjddias/48273923674.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxofidipo/nijgiie/najozij.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/cjcjbCl/fruit_clinic_game_level_46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428342/normal_602c12ede11a1.pdfIn PDF document text
    • https://cdn.sqhk.co/zokosofu/hdjdgd3/kicking_horse_campground_field_bc_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/suxevevagova/hbjjjeo/donusavax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fozeworot.rf.gd/68028981034.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/red_leaf_logo_answer.pdfIn PDF document text
    • http://konevimojo.epizy.com/noxapowudivekil.pdfIn PDF document text
    • http://xowatelowudok.rf.gd/91790267244.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/87927909599.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/gebajonalomizilapoti.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF546 5316 bytes
SHA-256: 85bb7fd639f16e08d491e7507ef661c11c8bfbfec2d6b57abc4612f3cb9d5aaf
font_01_sfnt_off00010755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10755 15952 bytes
SHA-256: 5f4241b924a62167ce81ecaa05885c417bbb54738738bd5d944bb43bcb098aeb

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