Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bfa6d8476bceb74…

MALICIOUS

PDF

74.2 KB Created: 2021-04-06 21:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2603b002c7d72ac24f267c0f50782365 SHA-1: 5061a4b9a51118382a5150daa598dde5cd92817d SHA-256: 2bfa6d8476bceb74104d141938d1d169a9765ff9c6edc7f6971352417684abed
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by both heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://jumiwimov.ru/wix?keyword=5-6+parallel+and+perpendicular+lines+reteaching
    • https://wogijelagorezu.weebly.com/uploads/1/3/4/0/134096035/4458246.pdf
    • http://buzobofojixez.iblogger.org/cdigo_penal_comentado_cezar_roberto_bitencourt.pdf
    • https://cdn-cms.f-static.net/uploads/4487618/normal_606842c0281be.pdf
    • https://cdn-cms.f-static.net/uploads/4383445/normal_6061318248c0b.pdf
    • https://cdn-cms.f-static.net/uploads/4380084/normal_6022a6d2a9973.pdf
    • https://static.s123-cdn-static.com/uploads/4410015/normal_5fcdf499f1904.pdf
    • https://static.s123-cdn-static.com/uploads/4462339/normal_5ff8b5fa051c6.pdf
    • https://raxipova.weebly.com/uploads/1/3/4/2/134234678/f07496.pdf
    • https://cdn-cms.f-static.net/uploads/4418587/normal_5fd679db49d4c.pdf
    • https://cdn-cms.f-static.net/uploads/4446166/normal_604f4fa646a22.pdf
    • https://mutapeninudit.weebly.com/uploads/1/3/2/7/132712174/liwogomif.pdf
    • http://velapinatetus.iblogger.org/biometric_fingerprint_attendance_system_project.pdf
    • https://static.s123-cdn-static.com/uploads/4374979/normal_6001eacb4c43d.pdf
    • https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/8818894.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vuzudaru.epizy.com/rental_agreement_example.pdf
    • http://fizanotafogibag.rf.gd/how_much_do_entry_level_programmers_make.pdf
    • http://xafonabikox.rf.gd/coronary_anomalies.pdf
    • http://gureragiwoxoseg.epizy.com/animal_crossing_pocket_camp_android_apk.pdf
    • http://fuwakusoju.rf.gd/zazasov.pdf
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_f690b29594d344debfd071f6fcff58cb.pdf?index=true
    • https://ede36962-9452-4451-b182-fa4236ba9bc6.filesusr.com/ugd/83b1b3_7f81f8bb20424812b8990279b1789f0e.pdf?index=true
    • http://panisot.epizy.com/15083628486.pdf
    • http://meguler.rf.gd/joxunipetolezenovek.pdf
    • https://cc4f1b1a-08c7-467e-bb5a-e3073ad8caf1.filesusr.com/ugd/ffc175_04fff294286e440689b46618c48f244d.pdf?index=true
    • http://tavupovasar.rf.gd/banyan_tree_3d_model_free.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_off0000d541.bin
a4760434340c3ab784deb2b1d2301b0fe9cb8e9bc237f79ebdc8c3fb36ce03ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD541 5320 bytes
font_01_sfnt_off0000e743.bin
2cf438a903b8f5d7d5744535265b0aa31e21eceaea149992cb62fc7d02cf1803		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE743 10916 bytes
font_02_sfnt_off00010cbf.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBF 4324 bytes

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