Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0fc45b379195ea3…

MALICIOUS

PDF

81.6 KB Created: 2021-04-22 17:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d57473f90137f81e45aa04f0ccbaf293 SHA-1: 6a5d53237f6feacaf5ab6ba8212f9d38bd91a965 SHA-256: f0fc45b379195ea3dcec3ee76a91b692badc672c942db36f4fc2e3345ba4bb19
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many of which point to disposable hosting, suggesting a link farm or phishing lure. The primary malicious URL identified is https://xajibur.ru/strik?utm_term=vanity+fair+ivanka+friend, which is likely used to redirect users to malicious content or phishing pages. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://xajibur.ru/strik?utm_term=vanity+fair+ivanka+friend PDF link annotation
    • https://naketutetan.weebly.com/uploads/1/3/4/6/134660231/c9270e0.pdfIn PDF document text
    • https://petapizegu.weebly.com/uploads/1/3/4/3/134327096/a08ab39aaa.pdfIn PDF document text
    • http://sosebazud.22web.org/radiation_heat_transfer_a_statistical_approach.pdfIn PDF document text
    • https://pemilixip.weebly.com/uploads/1/3/5/3/135330450/zuvewewevi_wanewarevix.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/pavoxinen-lubaxamokeleda.pdfIn PDF document text
    • https://kavasudominid.weebly.com/uploads/1/3/0/8/130813783/fikupig.pdfIn PDF document text
    • http://vazutiz.iblogger.org/argos_catalogue_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5f7bda84-df8c-4dfe-a28d-bcb85eefa7d5/the_norton_anthology_of_english_literature_9th_edition_volume_b.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e860aa61-b47c-4534-b8c7-4c71ed741607/is_storm_on_the_island_about_the_troubles.pdfIn PDF document text
    • http://gejebegujisutil.rf.gd/zikimisipiramapefazoni.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/eliphas_levi_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/110a0909-8bc8-42fc-ae7b-e104b54707bb/gotofiruzigabi.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/daxiv.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/sijote.pdfIn PDF document text
    • http://damusoborubumo.epizy.com/hannah_arendt_ita.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/how_to_overcome_fear_of_death_quora.pdfIn PDF document text
    • http://wadatexutogowig.rf.gd/free_elevated_playhouse_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/buripafivaromifabaferu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65c3c804-b040-4b9d-b926-727f759c7a99/75885708975.pdfIn PDF document text
    • http://tanasebebibe.epizy.com/digraph_worksheets_th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/509d27c4-9610-47db-bc08-10d162fa4f97/98556101332.pdfIn PDF document text
    • http://mavexewaxomem.rf.gd/swann_security_cameras_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e56012de-db2f-40d9-9f33-95b4b7089246/lebopevewexomekajopa.pdfIn PDF document text
    • http://nupuwabubud.epizy.com/agriculture_in_israel.pdfIn PDF document text
    • http://luzivamo.epizy.com/baguio_to_sagada_travel_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26bd105f-1e53-4ebd-b84a-b91ddcb7025c/why_does_my_wahl_clipper_not_cut.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 4560 bytes
SHA-256: 09b769d53b41953386ca2d5fd950337ef3f6f35b715a2760636b5ddb8618ed69
font_01_sfnt_off0001072b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072B 10348 bytes
SHA-256: 81aa47914a882f5c32b0a7c69fc5a64305f1453e7e44b132c6b6b8babbde80dc
font_02_sfnt_off00012aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA9 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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