Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d477cbe4984149b…

MALICIOUS

PDF

77.5 KB Created: 2021-05-19 21:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4788eb2f083c2e4252e7131d034d3c52 SHA-1: d6f08ca623a5aa345080a613a8c16a206a8e10ea SHA-256: 2d477cbe4984149bee23ccbde455ca95a7ba2c3d6b58a8b1d7970a564972eee7
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to educational content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=lecture+suivie+cp%252Fce1+avec+tapuscrit
    • https://cdn-cms.f-static.net/uploads/4408989/normal_60248d60bd7a3.pdf
    • https://moremutinujiti.weebly.com/uploads/1/3/4/8/134865562/fidarebozolo.pdf
    • https://cdn-cms.f-static.net/uploads/4469374/normal_602f79d71ff0a.pdf
    • https://dufebekeromodi.weebly.com/uploads/1/3/0/7/130776386/tusimuzelebuvegewod.pdf
    • https://sudomudes.weebly.com/uploads/1/3/0/8/130874284/ebbe6fb6.pdf
    • https://movakesomerinid.weebly.com/uploads/1/3/4/5/134528648/jerutizon.pdf
    • https://lubebubekawi.weebly.com/uploads/1/3/4/7/134714091/lovixib.pdf
    • https://static.s123-cdn-static.com/uploads/4495402/normal_5ff42ca6d199e.pdf
    • https://cdn-cms.f-static.net/uploads/4462352/normal_604db0ca901d7.pdf
    • https://cdn-cms.f-static.net/uploads/4452161/normal_604a312ad663d.pdf
    • https://static.s123-cdn-static.com/uploads/4405662/normal_5fde8da45ee90.pdf
    • https://tizupokewa.weebly.com/uploads/1/3/4/0/134013062/c53802.pdf
    • https://sazunanul.weebly.com/uploads/1/3/4/4/134488017/togabomaxejipi.pdf
    • https://static.s123-cdn-static.com/uploads/4495558/normal_5fedf1e5a35fd.pdf
    • https://static.s123-cdn-static.com/uploads/4486550/normal_5fee191aa475c.pdf
    • https://static.s123-cdn-static.com/uploads/4445739/normal_5fcd8d673997f.pdf
    • https://cdn-cms.f-static.net/uploads/4404959/normal_6053ec0fda359.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ff79637f-edde-40d5-b5ae-cace93ee9bd2/can_i_get_a_loan_with_a_green_dot_card.pdf
    • https://uploads.strikinglycdn.com/files/ee198668-5c89-4136-a533-127a71712e43/birolekisidonopozur.pdf
    • https://s3.amazonaws.com/xukirizugukugi/sigotixo.pdf
    • https://s3.amazonaws.com/jivuxo/what_are_the_advantages_of_non_conventional_sources_of_energy.pdf
    • https://uploads.strikinglycdn.com/files/4ce1a3c8-ac58-41ed-8f77-e2b2539a445a/evh_5150iii_50w_el34_1x12_combo.pdf
    • https://s3.amazonaws.com/bejenosugede/sawisela.pdf
    • https://uploads.strikinglycdn.com/files/5c088563-e694-4132-8cbd-c2892508bfaf/what_are_the_strengths_and_weaknesses_of_feminist_theory.pdf
    • https://s3.amazonaws.com/bibejovixapis/radosadufis.pdf
    • https://s3.amazonaws.com/jemisajoda/43487210876.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_off0000eb9c.bin
f537a51f3909f023aaf08133302137ae2be8358adda81b428043cc5b0049391f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9C 4984 bytes
font_01_sfnt_off0000fcb9.bin
f827197c8617812e25b42d31d42ff799bc0f893a2f89ac452b12f17739818057		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB9 13288 bytes

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