Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbaf6739ae501e82…

MALICIOUS

PDF

76.4 KB Created: 2021-06-02 01:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1558316f0855ee466a90c5966b80cf70 SHA-1: de4c77891b7be6319b9772199cecefdae884a743 SHA-256: fbaf6739ae501e821d0c7214bc3c78b009ad8359971136d6e089cce00430c51b
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/123?utm_term=lesser+banishing+ritual+of+the+pentagram+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380229/normal_603041d18fbfd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428083/normal_5ffb4fb757ec0.pdfIn PDF document text
    • https://xularidamilizal.weebly.com/uploads/1/3/4/6/134685918/9d117667c729620.pdfIn PDF document text
    • https://lonewarole.weebly.com/uploads/1/3/4/5/134593790/102bc7cbc66d8.pdfIn PDF document text
    • https://lirurarupo.weebly.com/uploads/1/3/4/7/134770738/6332ad8a.pdfIn PDF document text
    • https://fawukudaboguris.weebly.com/uploads/1/3/4/3/134353338/3291271.pdfIn PDF document text
    • https://kobenavu.weebly.com/uploads/1/3/4/7/134714827/pekete.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/42ac903d-c754-4198-8350-9cd6cc992a25/can_you_trade_options_on_robinhood_app.pdfIn PDF document text
    • http://xofitesu.pbworks.com/w/file/fetch/144439656/how_to_use_golf_clash_wind_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67998bbf-090f-419c-ab70-c99166dd1bf4/zimoribasuwalojiju.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/w/file/fetch/144451434/10104884749.pdfIn PDF document text
    • http://nerobedevu.pbworks.com/w/file/fetch/144481377/vepogegonorasefutise.pdfIn PDF document text
    • http://zikasamu.pbworks.com/f/gta_vice_city_cheats_file_download_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c03265-28fa-4ef1-bd84-706ad999b09b/instructions_for_completing_form_ds-11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e4a70d7-7fc9-4a7c-99ee-69f7fa724388/93025661682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53df1b39-c7ea-4b80-b72b-95c681ba4d80/dabilomivanidaxuzixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab5c39e-f11c-4de2-90a6-402f6d3f7a76/71811010100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be91eb72-778e-4457-976a-56b20e8f7dcc/ariens_deluxe_28_sho_owners_manual.pdfIn PDF document text
    • http://pimepovume.pbworks.com/f/kenmore_elite_washer_error_code_f27.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2266e38-fbef-4c39-ab91-bf595855f02d/xaxowepap.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_off0000ec93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 5536 bytes
SHA-256: 8b19bbc847c6dc138b81c833ad802b8c0075ad7451373fa53634b380ea96cde4
font_01_sfnt_off0000ff3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3F 10848 bytes
SHA-256: dcef99d0206b058fd87523e51dc40f48d6ca5307ab8db5ce3c6accf8d6a0624c