Malicious PDF — malware analysis report

Static analysis result for SHA-256 da07ff09fcccdc0c…

MALICIOUS

PDF

82.5 KB Created: 2021-03-26 08:18:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39ef114319e0295b7d808e2746d9250b SHA-1: e4d753237dd2db96ed294b653cbef4efeac0d32a SHA-256: da07ff09fcccdc0c647817f2dc4bb42425ad33a2bc2591898c1723fceb86b4b5
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'ponafet.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to educational content, aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/wix?keyword=properties+of+parallel+lines+answer+key
    • https://static.s123-cdn-static.com/uploads/4453885/normal_5ff5be6d85e6d.pdf
    • http://cafe-cok.ru/geniwobin2a65w.pdf
    • https://cdn-cms.f-static.net/uploads/4446038/normal_601c0424ed101.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • http://magnitoli-2ekran.site/counter_strike_source_weapons_skins_packobbws.pdf
    • http://hyipinvest.site/how_to_split_wood_with_wedgeam00u.pdf
    • https://static.s123-cdn-static.com/uploads/4482002/normal_600671a171506.pdf
    • https://cdn-cms.f-static.net/uploads/4462974/normal_60123dd9259c1.pdf
    • https://cdn-cms.f-static.net/uploads/4488090/normal_6034372846c78.pdf
    • http://taroburi.iblogger.org/introduction_to_arithmetic_theory_of_automorphic_functions.pdf
    • http://confirmationhelpcenter.com/60th_birthday_greeting_card_template8mdy0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/legenapi/sarah_dessen_book_list_in_order.pdf
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_4d53e37aa5814b7997bdfb1d5d799414.pdf?index=true
    • https://58fabbca-0322-4868-a582-948aa19840f9.filesusr.com/ugd/93748c_6143afe1eace41c993be5e44fa1344f0.pdf?index=true
    • http://zenuvivasefum.epizy.com/how_to_fix_clogged_printer_nozzle.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/bobovuzifusawamifumifi.pdf
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_52a2bb91ad46424ea6a738638af85ee2.pdf?index=true
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_ff553f575c0e46fb9014aa8348deb701.pdf?index=true
    • http://jojomuge.epizy.com/utorrent_for_android_uptodown.pdf
    • https://s3.amazonaws.com/mefovu/rijizudukixibijozajidol.pdf
    • http://gotazuvibidok.epizy.com/choodiyan_full_song_free.pdf
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_6f14c3a51c134c4a92e513dac4be01cf.pdf?index=true
    • http://kotidaw.epizy.com/86654331699.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_off0000ee43.bin
d724e310f5fe459cf013750d9e34d63d227d2d401f13fd2afb682d3bfb85ab11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE43 5152 bytes
font_01_sfnt_off0000fff2.bin
402f549ff84024f9710a338bd9903927f58496785b524b3a37cbd66ea631aceb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF2 11732 bytes
font_02_sfnt_off00012736.bin
46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12736 16120 bytes

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