Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a27dd64f407349…

MALICIOUS

PDF

75.9 KB Created: 2021-03-27 22:33:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 479e77928c01620bbda0a5f1c27356af SHA-1: d70677885555113a08465c4cb9fc06957918a55c SHA-256: c5a27dd64f4073495206a4353b49e4dc2f88ac6f739fdbde04851193732639f2
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7562

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://lozipotod.ru/award?keyword=dr+b+m+hegde+books+pdf
    • https://woxawilafuzuve.weebly.com/uploads/1/3/4/6/134669094/85a238f.pdf
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/3175f59.pdf
    • https://votorivoxezi.weebly.com/uploads/1/3/4/0/134095847/02e79ddc232.pdf
    • https://dekukosozo.weebly.com/uploads/1/3/1/0/131070054/bibugurinekuriga.pdf
    • https://pusiravuzefabi.weebly.com/uploads/1/3/4/4/134483733/borubusaxokosetaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_03ca694879b54b35b4e450e1df8c3fac.pdf?index=true
    • https://uploads.strikinglycdn.com/files/503dfd09-7709-4789-8ef3-9e1f59c7be45/how_much_is_a_fire_ant_queen.pdf
    • http://fapegilijaz.rf.gd/60895823798.pdf
    • http://rebikaxizoso.rf.gd/who_turned_down_the_role_of_michael_corleone.pdf
    • http://bejusasojagu.epizy.com/rangeela_tara_chabila_tara_song.pdf
    • https://uploads.strikinglycdn.com/files/41bd9e07-0d3b-45b9-a71d-d26c50a2a4a7/movukejom.pdf
    • https://uploads.strikinglycdn.com/files/8d56e982-4002-4b74-8872-b90ba00d0d84/21509151067.pdf
    • http://zukixewagiv.epizy.com/63785051579.pdf
    • http://wavubodalut.epizy.com/shipping_logistics_interview_questions_and_answers.pdf
    • http://pexevogawi.epizy.com/b150m_bazooka_plus_manual.pdf
    • http://toxuxefegetej.rf.gd/59028904706.pdf
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_1f07e263e0444c51871b59c166217660.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2b8.bin
6e48c67bff0ddc3c6afa387b8ea7170f6e213297a2f19bf11bca3da2d7e858a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B8 5416 bytes
font_01_sfnt_off000104f9.bin
4cc8c34fb5882d2d2c8d53e57fd1a87a1b5e67667104e71c7fa70ccb3ceaecf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104F9 11540 bytes

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