Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce62a954bcef4f1a…

MALICIOUS

PDF

73.4 KB Created: 2021-02-08 04:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 368d8ea88d86f180ba91cfd336905246 SHA-1: daa4f57413f5ac5b9089f160e54c7334dd3ea29f SHA-256: ce62a954bcef4f1aaccba59aa0d66e921a96323610a5931870a9b1a1e0e6bb52
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, many of which point to disposable hosting and are likely part of a link farm designed to obscure the true destination. The document body, though heavily obfuscated, suggests a lure related to downloading a 'human brain coloring book free pdf'. The presence of embedded URLs and the overall structure strongly suggest this PDF is designed to redirect users to malicious content or download further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=the+human+brain+coloring+book+free+pdf+download PDF link annotation
    • https://cdn.sqhk.co/jitegoji/24sq8hf/29837102462.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/igj4uRe/joboginemuzovosiral.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463785/normal_5fd13e2ca0dda.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/2nghyD4/59059188289.pdfIn PDF document text
    • http://nuxuxavolas.22web.org/89565483712.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450632/normal_5ff366e48a535.pdfIn PDF document text
    • http://bogplaktnc.fun/dr_house_capitulos_completos_en_espaol_latinoxd41j.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxarufodir/hhgg7if/spongebob_game_frenzy_mod_apk_1._5._2.pdfIn PDF document text
    • http://probmake12.xyz/fish_aquarium_video_for_tvpjj7u.pdfIn PDF document text
    • http://vkysnaya-eda.site/amway_nutrilite_products_catalogueemnm3.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/LOt9hct/scentsy_nightmare_before_christmas_burner.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/xeruxaxer/17912556116.pdfIn PDF document text
    • http://ranemojak.epizy.com/new_hd_bhakti_photo.pdfIn PDF document text
    • http://diwejijozijigez.rf.gd/person_tracker_toolkit_2017_app.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/kukusabedodepudefinit.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/us_national_anthem_trumpet_sheet_music.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_off0000decb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECB 5636 bytes
SHA-256: 0036a972f84a86a1d6da1863cbd76853f459646f5602bfe9949b3a7c02e2344f
font_01_sfnt_off0000f1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D4 11236 bytes
SHA-256: f567c8e9877dcbb1a8f5f5f0838944181587e9fb00fe35bd7fbb81012e5168d7

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