Malicious PDF — malware analysis report

Static analysis result for SHA-256 82011dac066374df…

MALICIOUS

PDF

74.4 KB Created: 2021-03-01 23:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 47e10d977c6dff705e4416e1df8d10c7 SHA-1: ef938689bb224cdaae9efa8060b837b8014fea78 SHA-256: 82011dac066374dfdad7e590fa51d8ad05d197c80dca3557870b5a274220bced
126 Risk Score

Malware Insights

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

The file is a PDF that contains embedded URLs and metadata designed to appear as a legitimate document download. Heuristics indicate it is a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also flagged it as malicious with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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://dugedepap.ru/strik?utm_term=descargar+biblia+dios+habla+hoy+gratis+pdf PDF link annotation
    • https://noxijinijomud.weebly.com/uploads/1/3/4/7/134746703/nusofedijesak.pdfIn PDF document text
    • https://menekagamop.weebly.com/uploads/1/3/4/0/134097565/tamugulobas_lavagunojare_rekefes.pdfIn PDF document text
    • https://xafokevixutevib.weebly.com/uploads/1/3/2/6/132681308/juzodobujiwixoz.pdfIn PDF document text
    • http://skout.tech/961787256882ofna.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/what_is_pbl.pdfIn PDF document text
    • https://xidolunojedi.weebly.com/uploads/1/3/1/0/131069950/dofinopikugafa_molisonip.pdfIn PDF document text
    • http://com-signto2.xyz/concours_castor_informatique_2018_mathmatiquesyoqhd.pdfIn PDF document text
    • http://reetodo.online/worottkzwn.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/cannot_open_printing_preferences.pdfIn PDF document text
    • http://comp-arenda.site/dd_dice_box_gift9895m.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/jiwotarotavuz/chimera_jailbreak_ios_12._2.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/icd_10_code_for_chiari_ii_malformation.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/64727914285.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/what_course_should_i_study_to_become_a_real_estate_agent.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/google_maps_satellite_street_view_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/facer_chemistry_a2_answers.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_off0000d898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD898 5660 bytes
SHA-256: ecd82acd8305872c6a762fa250e0f016a7633d2b7b17ab59bb83b3b4d85ffe8d
font_01_sfnt_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 12048 bytes
SHA-256: a9bda585f20fcf819ad171143989a4abf4e6596fc1e1d1a4e2a6d26bb509fb50
font_02_sfnt_off00011325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11325 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df

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