Malicious PDF — malware analysis report

Static analysis result for SHA-256 564d0d3590230c01…

MALICIOUS

PDF

79.0 KB Created: 2020-12-15 01:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: eb161b5ebf936921e2fab8204f4f9072 SHA-1: b7f6c30d0f8e626297c4e2237dde95fc1139d8e1 SHA-256: 564d0d3590230c0157eebed120c6eb84ab189c03f5d951f5acfca6179d84b976
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. It also contains a large number of embedded URLs, suggesting a link farm designed to direct users to potentially harmful sites. The ML classifier and ClamAV detection further support its malicious nature.

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://traffmen.ru/123?utm_term=vlookup+in+reverse+direction In PDF document text
    • https://cdn-cms.f-static.net/uploads/4467915/normal_5fa99553f28ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479460/normal_5fbc1e0d285b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415768/normal_5faad4843f9a3.pdfIn PDF document text
    • https://robesiso.weebly.com/uploads/1/3/4/5/134501854/2619267.pdfIn PDF document text
    • https://jamexujibelesuw.weebly.com/uploads/1/3/4/7/134748805/texenonizerelugu.pdfIn PDF document text
    • https://tetizapafatig.weebly.com/uploads/1/3/4/6/134634663/xegewenala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404969/normal_5fc0503236de7.pdfIn PDF document text
    • https://kukevukoleguko.weebly.com/uploads/1/3/4/2/134265740/6289512.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/your_game_booster_pro_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/o_que__capitalismo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6279fa04221c71180f97/1606378107173/29667893339.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/zotuf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce7adeb0d0046e84609e63/t/5fd146a8b9af546e4d352dfd/1607550634048/kijekakukugebasex.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_off0000f619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF619 4948 bytes
SHA-256: c63edb1013ddfdf427ede0e37e4b01b2439f0cbb21cf805ac1ca2c89d3b6f3aa
font_01_sfnt_off00010708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10708 12048 bytes
SHA-256: c01792b63a9aafa74828ba817bcc98f8bd3b6954e6c7416fd84702b86c3eddca

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