Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb622b86a18d787…

MALICIOUS

PDF

75.2 KB Created: 2021-02-26 11:59:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 357ba8442948c0a69bda9ad2ff974777 SHA-1: 52f6e74bd04b430d816947798ba670ee6b21daee SHA-256: 3bb622b86a18d787386926e191da64fed85b10132721175ed9b2a3e9d473fcf0
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary one pointing to 'dugedepap.ru', suggesting a lure to a malicious site. The document body, though heavily obfuscated, contains keywords related to search queries, reinforcing the phishing pretext.

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/award?keyword=dd+wrt+default+password+web+gui PDF link annotation
    • http://manybigs.space/going_nowhere_fast_reading_passage_answerszmbdd.pdfIn PDF document text
    • https://gaxadujabe.weebly.com/uploads/1/3/0/7/130775632/dosefalej_vuvonuzefimun_pebodosulewi.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/jivotosibigob.pdfIn PDF document text
    • http://excellent-spb.ru/pilot_logbook_spreadsheet_templatelo60a.pdfIn PDF document text
    • http://noverst.xyz/bosujidudofozibapisivzh7x9.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/attack_on_titan_season_4_episode_release_date_schedule.pdfIn PDF document text
    • http://leadtop.co/audacity_2.2.2_manual_download3pf3f.pdfIn PDF document text
    • http://myfirstsite.xyz/football_manager_2020_touch_switch_cheatsiwa1d.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/lowuwofuxali/votejasebobotamuxej.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/beko_oven_oif22300x_manual.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/sevozusudafut.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/bipogupar.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/uppsc_2018_answer_key_paper_2.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/microelectronic_circuits_7th_edition_solutions.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_off0000e99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99F 5440 bytes
SHA-256: 7ae3aa2f08b1b38da49512d4a3b22f6bc757fa13dd6033ed0567c83e55c38e42
font_01_sfnt_off0000fc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 10472 bytes
SHA-256: 09b44d64f71459114b4516f043aca79979e4a24b2f2c2d27af75b2212341e5e5

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