Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc39a46457882933…

MALICIOUS

PDF

76.0 KB Created: 2021-02-28 08:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 70dde40cc05fd66ccf3209d9aae4cab3 SHA-1: 1496bdf46efc4dd7dc24fa9dd2c6c0257db2db9f SHA-256: fc39a46457882933c5c83e0594ba5e323b458e4f5d50cde28809c7070c1d18c4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to suspicious domains, and a heuristic explicitly flags it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were extracted, the presence of external links and the document's deceptive title suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/123?utm_term=principios+de+economia+mankiw+resumen+capitulo+2 PDF link annotation
    • http://sexedate69.site/907069126363ltbt.pdfIn PDF document text
    • http://geguxejap.22web.org/lightning_digital_av_adapter_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/rUUNgg8/mount_fuji_sunrise_view.pdfIn PDF document text
    • https://cdn.sqhk.co/bozadukopufu/V1gkhaq/64080942659.pdfIn PDF document text
    • http://xusakarezexalu.iblogger.org/how_to_play_the_ukulele_for_beginners_easy.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/how_do_you_prepare_for_a_competency_based_interview.pdfIn PDF document text
    • http://leledup.mypressonline.com/tajep.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/roland_td-11kv_drum_set.pdfIn PDF document text
    • http://waliwosodumobu.iblogger.org/cholesterol_food_guidelines.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/vaxebisapesi/nutrition_information_deep_eddy_lemon_vodka.pdfIn PDF document text
    • http://jutejuviwolopis.rf.gd/werizezedon.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/android_developer_course_in_indore.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/how_to_check_bp_with_wrist_monitor.pdfIn PDF document text
    • http://potiwivig.epizy.com/pofefinusa.pdfIn PDF document text
    • http://sipariwemarisu.rf.gd/driver_canon_ip2770_for_macbook.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/savup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD75 5508 bytes
SHA-256: 1b1107a2ccc729644ce7f31b1c4f9114b42507058cade370fce5ce18db32d3d2
font_01_sfnt_off0000f027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF027 2048 bytes
SHA-256: ac563f1180543c9f4d9b102108afa0e0941b2fd4f199aa08af3cddd05ca1801a
font_02_sfnt_off0000f903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF903 11948 bytes
SHA-256: ba83750c965d1a981100d34d1bc5483d3682dbb6824d75e58a2331b4b1222ce9

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