Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9fba2dbb0fbe058…

MALICIOUS

PDF

80.4 KB Created: 2021-03-08 17:24:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cd61f01c46364c37a66a9b5ccc5704b SHA-1: b41b8a984187056f151f3096e897298d89191d3d SHA-256: b9fba2dbb0fbe058643ce7e8690a76026a5cea0397d322423c64cf1bfc7e8170
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'midufefew.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to product information.

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://midufefew.ru/wix?keyword=guide+gear+bivy+tent
    • https://static.s123-cdn-static.com/uploads/4452199/normal_5fdf2bd00dfe6.pdf
    • https://static.s123-cdn-static.com/uploads/4410459/normal_60078a317d0fe.pdf
    • https://miruvogix.weebly.com/uploads/1/3/1/4/131408245/fekanakef-vezeke-wajisikovori.pdf
    • https://zawibovime.weebly.com/uploads/1/3/2/6/132681883/c841a2.pdf
    • http://subumobo.22web.org/taxolibewojudetuseral.pdf
    • http://ronefed.iblogger.org/vizio_e43-c2_user_manual.pdf
    • https://najigojuvunijo.weebly.com/uploads/1/3/0/8/130874658/7697244.pdf
    • https://jemexegotida.weebly.com/uploads/1/3/4/4/134464186/sekutoramavoxutafij.pdf
    • https://zerimesatevig.weebly.com/uploads/1/3/4/8/134879836/fasum-xepuruxazebu-sozudunabisodus-zesemise.pdf
    • https://static.s123-cdn-static.com/uploads/4476954/normal_60047b622eefd.pdf
    • https://cdn-cms.f-static.net/uploads/4409610/normal_603b57b097676.pdf
    • https://cdn-cms.f-static.net/uploads/4416322/normal_60176380a0bc9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fd7a3b26-1471-4627-94e5-b964de83db5e/98239601668.pdf
    • http://padapafodimaf.rf.gd/danganronpa_v3_gifts_guide.pdf
    • https://s3.amazonaws.com/voropa/forwarded_call_notification_full_apk.pdf
    • https://uploads.strikinglycdn.com/files/65336701-2cf0-463b-8fe0-afc1daf12910/44097278949.pdf
    • https://s3.amazonaws.com/pasawe/proses_penyusunan_apbn_dan_apbd.pdf
    • https://uploads.strikinglycdn.com/files/cf6f51c3-1315-4b69-9101-a60b0409a2f0/vafixusevejebafuzejifu.pdf
    • https://s3.amazonaws.com/lusabifef/10208178798.pdf
    • https://s3.amazonaws.com/jupoti/bachelor_of_medical_laboratory_science_curriculum.pdf
    • https://uploads.strikinglycdn.com/files/13d7f64a-28d8-4857-9a6b-084dfe62ee85/skyrim_xbox_one_best_mod_list.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_off0000fe70.bin
edb3692e4f5ffa407ca8b3540edd26505017738967e206e5b902f4b7065efc6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE70 5116 bytes
font_01_sfnt_off00010ff8.bin
a87da371e6e91095c5605e43d54a682d66c5f048512be5900d957514b9e2a08c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF8 10628 bytes