Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc17dcddef2e574…

MALICIOUS

PDF

75.0 KB Created: 2021-01-19 19:28:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: db56f4f1d475523f17489c9bd546eb0f SHA-1: d8554d3d99d343c4f999c4da441cd809ec37f331 SHA-256: abc17dcddef2e574c6500feb43ef04dac2763d818acdea01e9f2440144b92f87
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one pointing to 'traffnew.ru', suggests the document is part of a phishing or malware distribution scheme. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the idea that the document is designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/123?utm_term=extra+torent.com+free+movie+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5fbd7b66de959.pdfIn PDF document text
    • https://cdn.sqhk.co/volotedi/igHl3je/city_jumper_new_york.pdfIn PDF document text
    • https://fegopamaxu.weebly.com/uploads/1/3/4/8/134896151/b3970d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482402/normal_5fedd0c287d7b.pdfIn PDF document text
    • https://xulegavumorojok.weebly.com/uploads/1/3/0/8/130813780/kalexilelixa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379029/normal_5fcc98c344a2e.pdfIn PDF document text
    • https://site-1257180.mozfiles.com/files/1257180/wurilokodetogade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384048/normal_5fad996fddb20.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/gh0jhjd/ligixodoj.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/gowixop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_5f99833e48d59.pdfIn PDF document text
    • https://dibekojiworibo.weebly.com/uploads/1/3/1/6/131637919/zerebazego_safipuwilux_ninoveriluk_dujasajugobun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421208/normal_5ffe6c75379fe.pdfIn PDF document text
    • https://site-1200133.mozfiles.com/files/1200133/95486481508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485156/normal_5fd96a8325e07.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/crfqfih/wamuvobemaguzowawawef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kubemumibesedu.epizy.com/godubogupogeg.pdfIn PDF document text
    • http://xofiketur.rf.gd/79604062958.pdfIn PDF document text
    • http://tukozadagafewan.rf.gd/bas_attendance_software_free.pdfIn PDF document text
    • http://sudiwoke.epizy.com/tefuzinewekupetataso.pdfIn PDF document text
    • http://nemebikox.epizy.com/85099486919.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_off0000e933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE933 5196 bytes
SHA-256: 4cad06a814ce25c54ba9b260d21d40f6b0e921acaa03267d8eb7664e868fcb9c
font_01_sfnt_off0000faeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEB 10336 bytes
SHA-256: a26eb5871e35fb7a6c5ae77137a4df68d171f228f079851778c96dd63a783da8

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