Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f79b460ef7cbb5…

MALICIOUS

PDF

69.2 KB Created: 2021-02-13 00:45:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37a1dce400f6a51670850ace399b75c6 SHA-1: db0fd20a0c355902df7222822c5c6a699246b242 SHA-256: d6f79b460ef7cbb5b1886652bb82cafbe1226b20b3c0a9e3ba44d16a36c53276
96 Risk Score

Malware Insights

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

The file is a malicious PDF detected by ClamAV and ML classifiers, containing numerous embedded URLs. One of the URLs, 'https://leonvi.ru/wix?keyword=isosceles+and+equilateral+triangles+worksheet+answers+practice+4-6', suggests a lure related to educational worksheets. The presence of multiple unknown reputation URLs indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=isosceles+and+equilateral+triangles+worksheet+answers+practice+4-6
    • http://rufamegepijuwo.22web.org/arpeggio_scale.pdf
    • http://com-servers.online/304401296322hfxj.pdf
    • http://kavanepamor.iblogger.org/sanur_bali_map.pdf
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/4723866.pdf
    • https://xepinepuro.weebly.com/uploads/1/3/0/9/130969238/bibipizefije-katabi-lelinovawoja.pdf
    • https://cdn-cms.f-static.net/uploads/4403260/normal_601fe7e54528d.pdf
    • http://daxosivonoz.iblogger.org/lusifijazekuxojiwiletiza.pdf
    • https://lijokojojet.weebly.com/uploads/1/3/5/3/135333606/viset.pdf
    • http://betawajapasex.22web.org/raduvep.pdf
    • http://connexion-amelii.xyz/66907737143l3ulj.pdf
    • http://latencfsrt.space/corporate_social_responsibility_shodhgangadgqwe.pdf
    • https://dulewidojupetor.weebly.com/uploads/1/3/2/6/132695372/e705b8c087a.pdf
    • http://kyhni.site/kuxetutetupnxd8.pdf
    • http://klossheff.xyz/past_perfect_past_simple_exercisezyrpt.pdf
    • http://storezone.info/viwanaanoeh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kagapari.rf.gd/malaguena_piano_sheet_music_ernesto_lecuona.pdf
    • http://figapow.epizy.com/berkanan_messenger_android.pdf
    • http://xedonufil.rf.gd/delunaler.pdf
    • http://dejamatokato.rf.gd/acer_aspire_5733z_drivers.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_off0000d0fe.bin
def5af9a6aaf9dc8a1d8434637947bc17aec70eff047c2cc04b09059dd2a7bce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FE 5828 bytes
font_01_sfnt_off0000e4eb.bin
1b9287fad5863af3f99d4337d0c70fc36a0ae9bc556b5079efd98a4555597011		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EB 9808 bytes

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