Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f60d6a2e514e7d…

MALICIOUS

PDF

65.4 KB Created: 2020-12-07 04:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 412b91c6bfde0bd1b85c5fee69bb175e SHA-1: 1231dd34d5da4eaf64806ee8f2d3a9f287b191f5 SHA-256: 82f60d6a2e514e7d85fa0f4c00580f9569401d413b0c98ce85a50226ce9237a7
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?utm_term=what+are+the+four+types+of+church+government In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_5f99bfd13dd44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423154/normal_5fa5d8c170675.pdfIn PDF document text
    • https://nulejekenafu.weebly.com/uploads/1/3/4/3/134367691/rotuna-zabumidamekifom-xagukuxusugofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5fa34c7968ac6.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://static1.squarespace.com/static/5fc1175aa879396864096daa/t/5fc3f7a53f75b166434edfe7/1606678439586/psychology_book_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/vonowebadipimugetegi.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/zilupozunumizerus.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/9429058341.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/jetmore_lake_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/thematic_apperception_test_tat_part_1_ebook_100_stories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3624e28-07e9-40ba-b48a-3943e90b4ab6/weathering_with_you_online_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffe61bf71053ccb0b2b06/t/5fc35f46bc819f1cf443d4ff/1606639430890/deuter_guide_35_review.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_off0000b698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB698 5404 bytes
SHA-256: 43e21711b9e78a9b3ebf399af88624bed09ba25314199c7a60b5a0e6b14ea5b8
font_01_sfnt_off0000c8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EA 9872 bytes
SHA-256: 079bbfaf30a9ea9eed2a88621976b1f035d988afbd2b6cbc04e544a8c9442d64
font_02_sfnt_off0000ea36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA36 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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