Malicious PDF — malware analysis report

Static analysis result for SHA-256 416b6a7620a960ea…

MALICIOUS

PDF

62.7 KB Created: 2021-03-22 23:25:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f123c1756cc8f6b60b085e3983c53802 SHA-1: b267586b63826aae8c69aabcaf1cbe299ac97d5b SHA-256: 416b6a7620a960ea9be4211c27f0f04db7e5f71f75a6c405e082fdc8a287711e
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML_NYX_PDF_MALICIOUS and ClamAV detections further support its malicious nature. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8467

Heuristics 4

  • 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.
  • 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
  • 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://gimoguvi.ru/award?keyword=missing+addend+worksheets+2nd+grade+pdf
    • http://design-kvartira.info/bleach_episodes_free_androidk8i5k.pdf
    • https://dikubone.weebly.com/uploads/1/3/4/6/134603537/221316.pdf
    • https://fetazudumaveber.weebly.com/uploads/1/3/4/6/134615608/zipujumojekaki.pdf
    • http://ponaxamewimenul.sportsontheweb.net/mawobepogekitajasudufu.pdf
    • http://bimoriz.getenjoyment.net/goninira.pdf
    • https://cdn.sqhk.co/bufutoje/d0icoKp/mivafakatewemupole.pdf
    • http://magnifioco.site/google_maps_api_v3_tutorial015n0.pdf
    • https://cdn.sqhk.co/rogudokives/ihJObjj/84692197083.pdf
    • https://cdn.sqhk.co/guposidum/Ljijfih/introduction_to_python_absolute_beginner_answers.pdf
    • https://cdn.sqhk.co/wifukatar/goSWii1/5558456390.pdf
    • https://cdn.sqhk.co/rifebonapesi/ge0ohgg/58536311521.pdf
    • http://bufo.online/how_to_teach_fanuc_robotnuntq.pdf
    • http://kusafomidufe.mywebcommunity.org/68493042654.pdf
    • https://cdn.sqhk.co/teposodigar/g5gfeXB/warcraft_gameplay_2020.pdf
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/8e545b97e8.pdf
    • https://bumibaniligaza.weebly.com/uploads/1/3/1/3/131383581/dipevoxuxetit-muwonibotep-xupeja-vebumewezatufi.pdf
    • https://wobufijurix.weebly.com/uploads/1/3/1/6/131607063/podaros_kobepuse.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://siniligavaxuvul.onlinewebshop.net/allahabad_high_court_decision.pdf
    • http://xedemigu.atwebpages.com/managerial_accounting_concepts_and_principles.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e671.bin
261ee68c5ddd7a2fdb1f0f462aae2bf27d378707a4c7060bbf5cb79d9f97f815		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE671 5564 bytes

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