Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa72ca0cd962dce9…

MALICIOUS

PDF

85.4 KB Created: 2021-04-21 20:37:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 082890d14d0ca7fa5b7e38f71405dab9 SHA-1: ec4952a430f4d04287ee7fcc6b7829ef9180c64a SHA-256: fa72ca0cd962dce90d5b10019c47f3942854fceaf964856e241f5bb7fc10fd4b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a large link farm, including disposable hosting and UTM parameters, strongly suggests a phishing or redirection scheme. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to lure users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/strik?utm_term=a+link+to+the+past+walkthrough+switch PDF link annotation
    • https://jevixivuxed.weebly.com/uploads/1/3/4/6/134622771/numefixiw.pdfIn PDF document text
    • https://mifimixaxenerut.weebly.com/uploads/1/3/3/9/133999571/7a7860.pdfIn PDF document text
    • https://namosupegu.weebly.com/uploads/1/3/4/3/134313644/movasufo-wonifopibifuge-majenojuzupag-taposobimuramob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467573/normal_606cae3a52f79.pdfIn PDF document text
    • http://radulifivezej.iblogger.org/vodafone_abstract_reasoning_test_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487632/normal_600408485803c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414152/normal_5fdb20073e3c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_602b740e690d4.pdfIn PDF document text
    • http://faguduni.22web.org/pubikonovedil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410975/normal_5fedfb7f4d27d.pdfIn PDF document text
    • http://sulogajifuv.iblogger.org/begetidedowopezuxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404503/normal_6015a50f66ffb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454426/normal_5fda4791622d2.pdfIn PDF document text
    • https://vokinojen.weebly.com/uploads/1/3/4/8/134851280/pixomaxixivaziker.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8ee240-49e5-4c95-940c-0f7f0c5fba74/what_is_dynamic_equilibrium_why_is_it_called_dynamic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2dbffa-892d-4f32-a9f1-b2bfd24153ce/17624503684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eab92a4-9552-430f-8f2a-8313804b2614/somewhere_over_the_rainbow_uke_chords_and_strumming_pattern.pdfIn PDF document text
    • http://rotibopifadukij.rf.gd/85974270845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc10721-afee-4fc8-b303-6667968c2166/62225893668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae9d97fd-c3ab-439f-96a4-ed2ea32ce9c0/96392516012.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_off000113c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C5 5340 bytes
SHA-256: 5597e5e6c71df5b11c60e98de875806d8e1a1c49128eca60e0c2acc4257a0226
font_01_sfnt_off000125fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FB 10104 bytes
SHA-256: 7c9d606ed2e3b04db375bc47c623df6963b307a69d45df53c5c4271b4f9d98eb