PDF malware analysis — malicious · 43362d9b580fb01a

MALICIOUS

PDF

94.1 KB Created: 2021-03-25 11:05:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e92ea7f432b36f26f5f4d7341908ad08 SHA-1: 9af146bb942f811abbf5b504dd3efa8c665971ac SHA-256: 43362d9b580fb01ae7d7cb23aab9fd1d9e2de2b46926ca9336a6e2ed4fc654a5

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a malicious PDF that contains embedded URLs pointing to external websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site for credential harvesting. The PDF's structure and embedded links suggest it's part of a link farm designed to obscure the final malicious destination.

Machine Learning

Nyx PDF Classifier malicious score 0.9505

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
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://jacksth.ru/award?keyword=almacenamiento+secundario+pdf
- https://kadilawozozupaj.weebly.com/uploads/1/3/0/7/130739633/a7a125e2a1168.pdf
- http://tipofeliluget.medianewsonline.com/nanumadamozerosu.pdf
- http://vetejula.mypressonline.com/descriptive_research_2020.pdf
- https://kosipomorogimel.weebly.com/uploads/1/3/4/3/134307263/gelowerelababuboniva.pdf
- http://juzezudusota.mypressonline.com/criterion_validity.pdf
- https://cdn-cms.f-static.net/uploads/4459623/normal_603161cfcf79b.pdf
- https://cdn-cms.f-static.net/uploads/4383913/normal_600f33e46fccb.pdf
- http://degimogug.mypressonline.com/office_assistant_duties_and_responsibilities.pdf
- https://cdn-cms.f-static.net/uploads/4446636/normal_601e772549589.pdf
- https://cdn-cms.f-static.net/uploads/4504922/normal_60481e76651b5.pdf
- http://mibikazut.mypressonline.com/urdu_taqreer_books_free_download.pdf
- https://mafopovum.weebly.com/uploads/1/3/4/3/134322216/ca902e7d85ba.pdf
- https://kafunonedejo.weebly.com/uploads/1/3/4/6/134662894/ebb52225f1a44.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/jenagubadopi/game_hay_cho_android_tivi.pdf
- https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_2be14b53465845309f20c97169f9bc9b.pdf?index=true
- https://s3.amazonaws.com/xuzed/3484537840.pdf
- http://xejawaji.myartsonline.com/gasudenojigozuxij.pdf
- https://s3.amazonaws.com/savukojubusum/76819495854.pdf
- http://kusababi.onlinewebshop.net/voiced_and_voiceless_sounds_chart.pdf
- https://08c3cc13-1ce0-4add-927e-a3aed263473e.filesusr.com/ugd/ccf397_3e19b8c1d3a2444a97f60a3e4a0f135f.pdf?index=true
- http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00015f4a.bin` `1152b8cdc4a165aacb79fb6f651130c3dffe098259a9f8a3f01f3b451a2bc294`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15F4A	5288 bytes

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