Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a5ed2e969e675c…

MALICIOUS

PDF

66.7 KB Created: 2020-12-04 13:51:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2152a83e2a0388bddbf6b44779eae869 SHA-1: 99b8495c9c2e08f30e903376ec7292e9bfd72f98 SHA-256: 54a5ed2e969e675c0b7375fa3005d318bd810bf0b5dd9c6de0cbc5d8d2dd067d
214 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, with at least two identified as malicious redirectors. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a high likelihood of this document being used for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?utm_term=r+distributions+cheat+sheet In PDF document text
    • https://zakiguranul.weebly.com/uploads/1/3/4/4/134480990/f763f30d4fd3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0c991c6d9645836219624/t/5fc30ccefa04221c7184a9e5/1606618325550/page_middle_school_gloucester_va.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf9555147b14804f89829/1606285658197/desoto_county_ms_tax_assessor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c362403f5353fd950a5e/t/5fc12178a97599144e1fbd3d/1606492537852/gta_iv_generate_unlock_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7ebf874-e96f-417c-80f7-924386933d6c/the_deck_of_many_things_tarot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd06fdc7afe470b557aa6d/1606223613307/johnson_county_aims.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc67727bd14ff0dd2c2c47f/t/5fc801721096a47934a4dc2c/1606943090819/marxist_theory_criminology.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe12f62dd96f5918b62d74/1606292214737/85665464112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/832fa3a5-db8b-4a98-96b5-f705f3de258d/infratemporal_fossa_structures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c125dc42-0bd3-49b0-af82-7490a8bd7ea0/36691344237.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1559bc6d9645836252c59/t/5fc34e9f3485235c86312e75/1606635167728/nosolutesugijaxaj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1175aa879396864096daa/t/5fc5ff5b4f98375720ad1847/1606811484123/29100135545.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29dd524b06a7eb30a4ada/t/5fc427551972c46e3c209a5a/1606690646154/sediluvew.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_off0000c684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC684 5140 bytes
SHA-256: ff34730428153b4747ece7e0ae2c9a3e69ae4c0d2d7b59590f1c1ea6f5531dad
font_01_sfnt_off0000d7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F8 11276 bytes
SHA-256: a1fa136fb3381e6bb543f4818f9a0dc49b35ff0d52f58452a1e40410b02dfbd6

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