Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e772ac44c31931f…

MALICIOUS

PDF

87.8 KB Created: 2021-04-02 13:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4771b944b6dd689d7ffbdea23b17189e SHA-1: cee4e45c5040cd097b741d607316fb016ae70def SHA-256: 6e772ac44c31931fd5a7087e9c1e6fe7378078d2c11959498206c734d16976ea
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that point to suspicious domains, suggesting it's used to redirect users to phishing or malware-hosting sites. The document body, though partially corrupted, suggests a lure related to 'exercises in English PDF', likely to trick users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/123?utm_term=exercicios+de+adjetivos+em+ingles+pdf
    • http://wunadimizurened.medianewsonline.com/ganijezifuwanasazajuper.pdf
    • http://edarudost.online/nipezezonijoxosm4z1e.pdf
    • http://gezinuduwep.medianewsonline.com/join_files_command_line.pdf
    • https://cdn-cms.f-static.net/uploads/4421466/normal_5fd671f333162.pdf
    • http://infokurs.design/52388293371dp2b2.pdf
    • https://ladipepisosixas.weebly.com/uploads/1/3/4/8/134898905/laxunusidewawefo.pdf
    • http://botavubapisod.mywebcommunity.org/71507113830.pdf
    • https://cdn-cms.f-static.net/uploads/4482027/normal_600ae4f1376c7.pdf
    • http://lnstagram-blue-badge-form.com/82942275501ex9q7.pdf
    • https://cdn-cms.f-static.net/uploads/4366668/normal_602aa5de537fa.pdf
    • http://reveruverof.medianewsonline.com/86877558507.pdf
    • https://static.s123-cdn-static.com/uploads/4497082/normal_5ff39297375b8.pdf
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/mikumezuwuli_lorovu.pdf
    • http://midunetojonawiw.mywebcommunity.org/22956811237.pdf
    • http://sowoxapexemex.sportsontheweb.net/88697728438.pdf
    • http://misstourist.info/titanic_music_sheet_recorder4xkbj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9eefbdd1-5c96-4c14-90ea-addb1b310b1a/77762407441.pdf
    • https://uploads.strikinglycdn.com/files/1ff50823-917c-4d80-a9e7-89ae3ef32685/rofebojojenuw.pdf
    • http://perexuwofogefo.onlinewebshop.net/sobajapimokide.pdf
    • https://uploads.strikinglycdn.com/files/62658a64-7773-4aac-a766-854228587990/25355828994.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f788.bin
00b0800ca2809216c36422731d3de48a4aec5029130638170c961f77303b1ccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF788 5636 bytes
font_01_sfnt_off00010aba.bin
7b6b603d0df19daa87d444f961c7cf2406132579b302a5b20697fad468775fac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABA 13012 bytes
font_02_sfnt_off0001330b.bin
b17298a50c4b8687c7329d90d090f61459b05f1e7eb49e900399f8fa3fdaf006		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1330B 19232 bytes

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