Malicious PDF — malware analysis report

Static analysis result for SHA-256 411d28cf54d1a709…

MALICIOUS

PDF

72.1 KB Created: 2021-06-03 07:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a337dc84d3a6fd8f49222cf47a830420 SHA-1: efbb3a8f93b69a8a6bc15f05afc5bf913bd5f20d SHA-256: 411d28cf54d1a7093faf2e6209b2301ebcba5b01949fb948b10e387619cfdb6f
186 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links to external PDF files, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body text, though heavily corrupted, contains a reference to 'Download autocad free trial 2019', indicating a lure. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution.

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://archism.ru/pbw?utm_term=download+autocad+free+trial+2019 PDF link annotation
    • https://vekupaju.weebly.com/uploads/1/3/4/4/134479754/mevoxafusela.pdfIn PDF document text
    • https://fupiledur.weebly.com/uploads/1/3/4/5/134527701/zazomenajok.pdfIn PDF document text
    • https://gebogezajir.weebly.com/uploads/1/3/4/6/134685536/kolipobobif.pdfIn PDF document text
    • https://xugojegisonixen.weebly.com/uploads/1/3/4/6/134684264/2212921.pdfIn PDF document text
    • https://zoxutelipiroga.weebly.com/uploads/1/3/1/8/131871488/6631618.pdfIn PDF document text
    • https://vusubidasezojix.weebly.com/uploads/1/3/5/3/135399418/1653934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481819/normal_6023109746e3c.pdfIn PDF document text
    • https://falusawo.weebly.com/uploads/1/3/6/0/136084102/8417448.pdfIn PDF document text
    • https://kukonite.weebly.com/uploads/1/3/4/6/134611202/2446336.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499979/normal_5fefc1ff49588.pdfIn PDF document text
    • https://tapukupe.weebly.com/uploads/1/3/4/7/134717462/wugipugubujubufala.pdfIn PDF document text
    • https://rumirasikimuzib.weebly.com/uploads/1/3/2/7/132710795/8890913.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/029e7c41-2fb9-4478-a295-6744299d273a/98920652921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/973420aa-6b4b-4b56-97c0-4904acb47b04/wayne_dyer_books_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a1a462-12bd-41fe-85f7-30b8cbe39ec9/xagosifer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac20dcf1-af75-49a2-876a-535f9b441b68/nitusi.pdfIn PDF document text
    • http://finebov.pbworks.com/f/dbz_ttt_ultra_instinct_mod_download_ppsspp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3093e288-a4cf-4fef-a3f0-7c77048e3179/vitojulowopi.pdfIn PDF document text
    • http://nagomax.pbworks.com/f/zovikobusabik.pdfIn PDF document text
    • http://banusiv.pbworks.com/w/file/fetch/144443013/andy_app_player_64_bit_download.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_off0000db67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB67 5408 bytes
SHA-256: 3b2ab07ac087532176447dd5527aa66d0a0866f295def4a03bda9b02e1f24981
font_01_sfnt_off0000edff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFF 11024 bytes
SHA-256: beec2164d0144f4dd6178b763d50b2fc9bbc3a18529e40452d13feede1ca9857

Open this report in the interactive analyzer, or submit your own file for analysis.