Malicious PDF — malware analysis report

Static analysis result for SHA-256 414068fe6c5cb96e…

MALICIOUS

PDF

71.3 KB Created: 2021-04-16 00:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 60a75f3827ab73c71c77e7bb7f5918ae SHA-1: 8f05daaac85bfaa1a7cd7f9178ba4540732fde7d SHA-256: 414068fe6c5cb96e28da4e4da178266211a2522b52b68b88ecadb2e88e428dcb
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing lures. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM indicate a large number of links, many hosted on disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/strik?utm_term=maritime+law+enforcement+manual PDF link annotation
    • https://gipurafesab.weebly.com/uploads/1/3/1/6/131637457/4603915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460944/normal_606e12c2d4015.pdfIn PDF document text
    • https://fijuvosezo.weebly.com/uploads/1/3/4/0/134096395/xizidaxin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481158/normal_6066c911c55d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381085/normal_6003ee162fd3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421350/normal_602d3e1581263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425768/normal_604e4dcc7e060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_6059c8f4c6fe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_6051df7505b5d.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/bass_guitar_fret_note_stickers.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/5772806354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_6065cb21cba42.pdfIn PDF document text
    • http://mokugujumekov.sportsontheweb.net/defazinisabowiruwu.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/a0b0bd69-5698-4c6b-980a-32f696a42201/36540257465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9906d7d7-79d5-41e9-af69-adef1cd4677d/how_to_use_mophie_case_iphone_xr.pdfIn PDF document text
    • http://genoropafetado.epizy.com/34187647729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e73612-1b5c-44f6-841a-277f4e1160f0/61653358114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1ae0690-ea6f-4f7c-995b-74c79b521037/nikon_coolpix_p610_price_australia.pdfIn PDF document text
    • http://tizabapokumi.rf.gd/70724367205.pdfIn PDF document text
    • http://nabukewegurizev.rf.gd/ejercicios_formulacion_alcanos_alquenos_alquinos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b03dceb-f393-4571-b7ae-99a244511008/hoover_power_scrub_deluxe_carpet_washer_fh50150_instructions.pdfIn PDF document text
    • http://diretoroj.rf.gd/25549686056.pdfIn PDF document text
    • http://lurorozowuwa.rf.gd/etq_4000_generator_parts.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_off0000daf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF1 4944 bytes
SHA-256: ae9bf72d0dd7300d174820bf020f277b7d502d554922ab5137496ba84cf7bc96
font_01_sfnt_off0000ebd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD0 10524 bytes
SHA-256: 806949ce6d41bd6d3e160f9ca2e561ff38c77f11fe1911736df318b5c6483fb0