Malicious PDF — malware analysis report

Static analysis result for SHA-256 912c883f0326cbaf…

MALICIOUS

PDF

74.7 KB Created: 2021-02-04 00:43:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 40897a28cd55e83e58a8af7db9ec4aaf SHA-1: a43d3f4366488c3517e377cbb32180ecfef9bbac SHA-256: 912c883f0326cbafdf7bacb4141d7fece20a7156085ace7ee50ba6a9a6cbe69b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, including one that masquerades as a '2007 chevy avalanche service manual' and another hosted on 'organic100.fun', suggesting a lure for users seeking specific information. The PDF structure and embedded content indicate it's designed to redirect users to malicious sites or download further payloads.

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://bologen.ru/wb?keyword=2007%20chevy%20avalanche%20service%20manual PDF link annotation
    • http://organic100.fun/labibuwigikosekevudenawuaeqn.pdfIn PDF document text
    • http://copyrightviolationcenters.com/best_ultimate_attacks_xenoverse_2ianvc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457305/normal_5fc8c828a7a1b.pdfIn PDF document text
    • http://xekumaluvox.iblogger.org/border_light_apk_gratis.pdfIn PDF document text
    • http://jogubewuzamofet.iblogger.org/score_hero_life_hack_apk.pdfIn PDF document text
    • http://fefebigaxef.iblogger.org/96769685248.pdfIn PDF document text
    • http://kismykeitio.best/10317718358yccht.pdfIn PDF document text
    • http://tublitalia.space/storyart_pro_mod_apk_download3x9nb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473410/normal_5fdf389c61f60.pdfIn PDF document text
    • http://storedubai.shop/zombieland_double_tap_rule63tz2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://linakagiwabofa.epizy.com/brother_in_arms_3_apk_mod_offline.pdfIn PDF document text
    • http://kowewewabozete.epizy.com/bostitch_6_gal_air_compressor_manual.pdfIn PDF document text
    • http://veveliwuw.rf.gd/gigemoxenuweru.pdfIn PDF document text
    • http://sulonofanez.rf.gd/vazewa.pdfIn PDF document text
    • http://dawivek.rf.gd/funky_town_piano_sheet_music_free.pdfIn PDF document text
    • http://fozubogedunok.rf.gd/35986662592.pdfIn PDF document text
    • http://julajibumomas.rf.gd/present_perfect_tense_worksheet.pdfIn PDF document text
    • http://mibaruruluket.rf.gd/42136460913.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_off0000e62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62C 5460 bytes
SHA-256: b1dbe384630abc069434c6b8e3dc427119856f89a80bf9e930cf7c47be172f6f
font_01_sfnt_off0000f8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A4 11532 bytes
SHA-256: a73804be4e689856a8fddc534ab606d3940f5e9937feb00626799b39edaf127d

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