Malicious PDF — malware analysis report

Static analysis result for SHA-256 85c0c84eda0cd796…

MALICIOUS

PDF

80.4 KB Created: 2021-04-02 09:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 049df1396b612eed8329dfe933cf5e19 SHA-1: 56424e407307fe22a058a56db334d10d2993c56e SHA-256: 85c0c84eda0cd79612683fe0403920ec7602aaff4b05e3c679c6f5f5b12febb6
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is `https://kuzutuzo.ru/award?keyword=love+after marriage novel pdf`. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/award?keyword=love+after+marriage+novel+pdf
    • http://rufujatev.iblogger.org/54163312237.pdf
    • http://djami.ru/55540021844km6zb.pdf
    • http://dewisazovuvoxi.mywebcommunity.org/how_to_use_the_karcher_jet_wash.pdf
    • http://guwejusu.22web.org/aston_martin_v8_vantage_workshop_manual.pdf
    • http://bnl-jobs.com/low_histamine_diet_food_listwy5aj.pdf
    • http://kozidozilujivox.getenjoyment.net/77579567387.pdf
    • http://topstop.site/wizawigotewukefikob8v4f9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_5af5753758aa46b5aedddea6a882b0ac.pdf?index=true
    • http://pemuvem.epizy.com/siguleduledonobuf.pdf
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_d18b74c0e3ea4d66813c96355c7cf694.pdf?index=true
    • http://runuwug.myartsonline.com/fonik.pdf
    • http://dakafatuvuguviz.atwebpages.com/82163782001.pdf
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_6ac5dd648a9d4835a726e25ca39f7b6e.pdf?index=true
    • https://s3.amazonaws.com/jaloto/vurorugaderuronunoxagu.pdf
    • http://lujubozugib.epizy.com/43815234500.pdf
    • https://s3.amazonaws.com/bifadiwuwileji/mizop.pdf
    • http://pimovutune.rf.gd/vemajidakawuza.pdf
    • http://rubujizuz.epizy.com/beverley_craven_album.pdf
    • https://s3.amazonaws.com/bitajemisajoz/39756927052.pdf
    • http://sabasil.epizy.com/79905244323.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/wumuwivixor.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f09e.bin
1091594bba736fdebe969641f2b1db85af8e6d54962968fc9f3377f861fc8d21
pdf-font-stream PDF embedded font (sfnt) at offset 0xF09E 4972 bytes
font_01_sfnt_off0001017a.bin
649dd57c0cc0a357b1331ec32a209922f0120573bb63bd745adac10294b05d2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1017A 10852 bytes
font_02_sfnt_off00012654.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12654 4324 bytes