Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b4b8d1dd012695e…

MALICIOUS

PDF

79.7 KB Created: 2021-03-01 21:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 33b87fd89603cf8240200067b7ae716b SHA-1: bec15d42974b7f1a774761e5ced97ce96f70e07d SHA-256: 9b4b8d1dd012695e83c1333b1d751c61e91b2658df007dcc2be6fd9ddf5c2e91
166 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be a pretext for delivering a password-protected archive, a common tactic to bypass gateway security. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://soxebez.ru/aws?utm_term=how+to+setup+d-link+router+as+extender PDF link annotation
    • http://worelimupuvefam.mywebcommunity.org/online_restaurant_booking_system_australia.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/how_do_you_cook_chicken_on_a_weber_charcoal_grill.pdfIn PDF document text
    • https://gatodagimisosog.weebly.com/uploads/1/3/1/3/131379801/cfb1915886d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422150/normal_5fde2b8a2e13e.pdfIn PDF document text
    • http://bidetoluji.getenjoyment.net/why_was_the_book_the_bluest_eye_banned.pdfIn PDF document text
    • https://tupetipu.weebly.com/uploads/1/3/4/4/134489263/gasozodomejomovawa.pdfIn PDF document text
    • http://detonic-ordina.website/gabutigupozidexuwe0t62y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391308/normal_600453dd54729.pdfIn PDF document text
    • http://homeolimp.com/babavuwugubofuzuzavowixojtytb.pdfIn PDF document text
    • http://adminhalil.com/fenomenologia_del_espiritu_wenceslao_roces9i9p5.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/who_are_the_characters_in_the_book_who_moved_my_cheese.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/bemix_tibizexolubib.pdfIn PDF document text
    • https://biwasigefo.weebly.com/uploads/1/3/1/3/131398444/busome_pinugatapuzime.pdfIn PDF document text
    • https://gasimela.weebly.com/uploads/1/3/1/3/131398285/dekow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_6027feb8e66a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5fd81b5d5c741.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/what_foods_to_avoid_to_prevent_eczema.pdfIn PDF document text
    • https://pujuxuzanebov.weebly.com/uploads/1/3/5/3/135351243/gumupuxi_lipuzekiwixub_benuni_nufigaku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pibusobi.epizy.com/mesisijupusudaf.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_off0000fb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB21 5172 bytes
SHA-256: c821f3066145cd802440f4311554febad1d7e057481f2cd5d9edb31cdcb388e8
font_01_sfnt_off00010cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDD 10676 bytes
SHA-256: 5ad258b0b71d0d257a1ab349a56a54adfeb733530f8fc8401a840f273ed92b11

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