Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed553a5741b4c2b…

MALICIOUS

PDF

60.3 KB Created: 2020-12-14 21:49:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 30f806b65666a83fe15a4fdc78f99c85 SHA-1: df2d81a2cce59c6350f5e9b2aca5b20462eec92f SHA-256: 5ed553a5741b4c2b04fc101c87f1ed61d2d38089299a5fcde9bea5335b4b7df0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed to redirect users to other malicious PDFs. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffset.ru/aws?utm_term=water+authority+of+fiji+annual+report PDF link annotation
    • https://xugomijomib.weebly.com/uploads/1/3/4/5/134578432/cc1296.pdfIn PDF document text
    • https://mowolonob.weebly.com/uploads/1/3/4/8/134874237/9007724.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/7805117.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/7185833.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/6863904.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/5fbce344be7cfc36344e8aaf/t/5fbd079d3fdc31513a1122cd/1606223773859/logeladevadoz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfb96c7afe470b556653e/1606220696170/bezivuwa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfeb102bbd74065800e14d/t/5fc415fc9d793648400e1744/1606686204774/41280038175.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b98048c1673e559ebd3e/t/5fc7f2ff89c46b43240ac010/1606939391287/tizizudirumijozumuto.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1cfa22cf09257bd7273ee/t/5fce7ad31d54d827128323c8/1607367380178/pekalalofusefezitedunum.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/chat_bin_app.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77ace717a0f60c4039b47/t/5fd17adfc10336458b2d6834/1607563999836/like_father_like_son_similar_quotes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d3acc6229360ecc6007a/t/5fd17832eeaf2774ac8328b9/1607563323126/15308324332.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/wumuxapa.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_off0000b170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB170 5004 bytes
SHA-256: 0f626072bdb15efd1c47977f2211fe7c4a7034e1fa5b6df76e5854682e158a78
font_01_sfnt_off0000c288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC288 9772 bytes
SHA-256: c8e9108a5566ed259a611b325211d969c6b8af75bc524ae5f8a1debfd1c287ec

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