Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc77b37fe8f3eaf…

MALICIOUS

PDF

73.9 KB Created: 2021-03-25 01:11:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2232b9cf0ff94c45ab32a887e498ee1 SHA-1: 5bedfaea5895905f9c391f3fcdd1c1641dc27f62 SHA-256: fdc77b37fe8f3eaffade822f4271c9da7ac09b60e2acc1775efde87f7df8441b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The document body, though heavily corrupted, contains text related to 'Bushnell binoculars repair manual', suggesting a lure. The primary malicious indicator is the embedded URL pointing to a suspicious domain, likely serving a secondary payload or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=bushnell+binoculars+repair+manual
    • https://cdn.sqhk.co/fasixazijaz/ghdigjb/beat_street_soundtrack_free_download.pdf
    • http://getallcreditscores.info/lekapidu47oof.pdf
    • http://yozi.store/458757077584db18.pdf
    • https://cdn-cms.f-static.net/uploads/4474736/normal_604995442179e.pdf
    • http://wikowezenitezo.medianewsonline.com/90096938356.pdf
    • http://rifijetuvijilam.medianewsonline.com/2012_jeep_grand_cherokee_reliability_rating.pdf
    • https://cdn.sqhk.co/pevizopubok/dhjIxtc/dark_corridors_2.pdf
    • http://checkmycredit.info/804198062649reyt.pdf
    • https://static.s123-cdn-static.com/uploads/4408188/normal_5fe568495321d.pdf
    • https://cdn.sqhk.co/baruduwege/dhcibjg/oakwood_plaza_movie_theater_hollywood_florida.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tenezozujilajiw.rf.gd/25624505619.pdf
    • https://uploads.strikinglycdn.com/files/bb742357-db1d-4b63-93c1-1665d6704e67/radusamonewi.pdf
    • http://mujebik.atwebpages.com/gre_big_book_analytical_reasoning.pdf
    • https://uploads.strikinglycdn.com/files/f51ee5d8-e1f4-4987-9c15-36df13f98b54/lutokawufelexipa.pdf
    • http://bifosegejigeg.rf.gd/wenibuxe.pdf
    • http://karifopiti.epizy.com/how_do_i_know_what_laptop_charger_i_need.pdf
    • http://raxajabidadida.onlinewebshop.net/time_table_12th_class_2020_mp_board_download.pdf
    • https://uploads.strikinglycdn.com/files/068805d4-50af-4376-90c8-c62ea526d5f4/86890545948.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e57b.bin
1efd660d253424800e69d8259c82b0107a8b87bf42de0afb1e2cbb28d0ebcac8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE57B 5360 bytes
font_01_sfnt_off0000f789.bin
cd6d4e9b4452c2651b5809114536588469bae685fbf99fb7038773c687e568a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF789 10192 bytes