Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9075d17a18d2d36…

MALICIOUS

PDF

85.8 KB Created: 2020-12-17 08:27:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 50f6f4b392612bfe8aa9af98356c563e SHA-1: 12481ef503c340052596560eb9b2be210be7a58f SHA-256: d9075d17a18d2d3699fc09aeb75ac4c8baeecdee158a94db0b54b77e1d81a164
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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/strik?utm_term=the+concept+of+political+power+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f88d1ddbf5a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425511/normal_5fa099af103bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407793/normal_5fd2277cbab9d.pdfIn PDF document text
    • https://donokodupotev.weebly.com/uploads/1/3/4/3/134317189/lemubono-dinixorab-wevivuza.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/f895c9.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/5fc670929698b02c7f46b266/t/5fcd59a91e1a4d7de13bff77/1607293354011/fuzedatufinivegelu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0078111f6a4198480da42/t/5fc0e4df18e72e5fdbf84839/1606477024907/zobasibewitogerat.pdfIn PDF document text
    • https://s3.amazonaws.com/sezutuma/10280422198.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfc1e64be903ae6404bf7/1606220831156/graph_of_cube_root_of_x.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/vubeletopuretisalesed.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4bfa2bd14ff0dd2b5522a/t/5fca60956cb6d01b09c08285/1607098518604/jungle_adventure_park_gardameer.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/freemake_audio_converter_full_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/amitabha_sutra_pinyin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12254405d5340f32af944/t/5fc54bd618e72e5fdb86b6c2/1606765527262/95817190004.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b42eab79f442f2353307/t/5fc4d5864e98326c02a927b8/1606735239084/ap_music_theory_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/pokerist_texas_poker.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_off00011607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11607 5104 bytes
SHA-256: 645131644953627332e6265ed9bea57bbdedb7870eab8474a85bbb890aa469f9
font_01_sfnt_off00012779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12779 10052 bytes
SHA-256: b34fe21226025bdd33b1b941987bd794da56a4dec04d395afed174534546c881

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