Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc79628e2eaa9f06…

MALICIOUS

PDF

77.0 KB Created: 2021-03-12 15:22:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d489833f26b7a03a6a151dfc9082a795 SHA-1: 5a6f823909764f021d9700044bc0f61ba909623d SHA-256: fc79628e2eaa9f06d40e28bb210cbe25a3ed8a33d150644bbc227a3b8b04750d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URL suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=sas+zombie+assault+4+mod+apk+unlock+all
    • http://sarkife.site/fuvemodosutifarudimorasip3k3q.pdf
    • https://cdn-cms.f-static.net/uploads/4388183/normal_604ae79423a3d.pdf
    • http://vashobereg.com/is_florida_too_hot_in_summerye1sp.pdf
    • http://merishwheelrecords.com/65096571416uay29.pdf
    • http://sait-ok.ru/kenmore_sewing_machine_158_user_manujtxdz.pdf
    • https://cdn.sqhk.co/pixorikibam/hbKFFji/civil_war_chancellorsville.pdf
    • https://cdn-cms.f-static.net/uploads/4488581/normal_603443f68e4be.pdf
    • http://slampochka.ru/nclex_pharmacology_cheat_sheetlhb2w.pdf
    • https://cdn.sqhk.co/nepelusir/KLmhijd/16843381512.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_dfc40ab38e1f437197e092beb4c1f16b.pdf?index=true
    • http://wuzuferopo.epizy.com/irritrol_total_control_6_station.pdf
    • https://s3.amazonaws.com/luxelula/baviremi.pdf
    • https://81da36f4-dec6-4bf4-836b-19ed67500659.filesusr.com/ugd/5fd5c1_70941e0e9e3b4f0ab62fb2348e11c113.pdf?index=true
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_2d317d269fa04864809ac4620e3b2354.pdf?index=true
    • http://pevurevakube.rf.gd/sewunubos.pdf
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_be85c20a4d6b456a9869b67d34ddb353.pdf?index=true
    • https://s3.amazonaws.com/kagedatabujo/veluterevutuloxug.pdf
    • https://s3.amazonaws.com/vobuturinivi/39836194485.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_off0000eff0.bin
76d1c840b2a1f3e2fb7fac4cd0df13e583cc6002821c4f1def8ea61a61ccd54a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 5568 bytes
font_01_sfnt_off000102de.bin
64742324c84f63f2d419058fe561fc0220fb4ebb7812e11a0982d506e900a31f
pdf-font-stream PDF embedded font (sfnt) at offset 0x102DE 10444 bytes