Malicious PDF — malware analysis report

Static analysis result for SHA-256 985da8833a409262…

MALICIOUS

PDF

78.8 KB Created: 2021-02-21 13:18:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23bd3eb10188c07f28d32ea7eff77567 SHA-1: bb6019f1826f285ed5b731c24b0ddde533140c5f SHA-256: 985da8833a40926285bfa088b972280d74b364c28e76475693f0863b66165a56
156 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it's a phishing lure, specifically requesting recovery secrets or private keys. The embedded URL points to a resource related to 'bitcoin mining apk', suggesting a social engineering tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://druttle.ru/wix?keyword=bitcoin+mining+apk+2019
    • https://cdn-cms.f-static.net/uploads/4373516/normal_5fd985e784c91.pdf
    • https://cdn-cms.f-static.net/uploads/4393772/normal_6031e528686a6.pdf
    • https://mobinefoju.weebly.com/uploads/1/3/1/3/131398425/7e45f1a.pdf
    • https://sajipetifejej.weebly.com/uploads/1/3/4/8/134883768/6350366.pdf
    • http://nomanodix.iblogger.org/psychology_applied_to_teaching_14th_edition_citation.pdf
    • https://static.s123-cdn-static.com/uploads/4421959/normal_5fddcfe609ebd.pdf
    • https://jurajewokikum.weebly.com/uploads/1/3/5/3/135349146/b01c15ed9410ed.pdf
    • https://cdn-cms.f-static.net/uploads/4454435/normal_601877031972b.pdf
    • http://vabakavolageni.22web.org/how_to_crochet_easy_flower_tutorial_217.pdf
    • https://cdn-cms.f-static.net/uploads/4460963/normal_6010197b32be0.pdf
    • https://jeludumekidi.weebly.com/uploads/1/3/2/7/132740852/8218519.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lojofoverom.epizy.com/pokoxitigobaraxub.pdf
    • http://xalanijowule.rf.gd/xufuxutulukopifedu.pdf
    • http://gedikoti.epizy.com/5046881240.pdf
    • http://sexuduwivaz.rf.gd/deduwag.pdf
    • https://s3.amazonaws.com/wiwuxot/gakeg.pdf
    • https://s3.amazonaws.com/donarepemi/access_database_employee_salary_administration_templates.pdf
    • https://s3.amazonaws.com/jalasilunaz/naxurizuwiz.pdf
    • https://s3.amazonaws.com/wovisak/17264219215.pdf
    • http://mitofozajibo.rf.gd/bluestacks_for_windows_free_full_version.pdf
    • http://zezewesiwakoruw.rf.gd/40740186046.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6f6.bin
82fff85f5ac0de3dd844c7d50cc03a0b51b950c57972700bb0cde84f2c1e3b5b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F6 5544 bytes
font_01_sfnt_off000109dc.bin
3034b9d1e47cebe02b9fd5e42e419a4a97447bbe51a8ffc41367ff303fe436ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x109DC 10596 bytes