Malicious PDF — malware analysis report

Static analysis result for SHA-256 02fa9881d2779333…

MALICIOUS

PDF

81.8 KB Created: 2021-03-23 22:15:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fe6d8ae787fd4ee100ce9d001afcfc2 SHA-1: 7a49cdda1551a97c53e837b63db21975021ab5aa SHA-256: 02fa9881d2779333a02e44b70b49a0c34dd0b77deca752fd568489612533bde1
136 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document's content is designed to trick users into believing there are new or changed bank instructions, a common tactic in business email compromise attacks. The embedded URL, https://jacksth.ru/wix?keyword=baixar+apk+editor+pro+gratis+2019, likely leads to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://jacksth.ru/wix?keyword=baixar+apk+editor+pro+gratis+2019
    • https://cdn-cms.f-static.net/uploads/4368746/normal_6019238501e53.pdf
    • https://cdn.sqhk.co/jivazufevi/Phghjgj/slotocash_no_rules_bonus.pdf
    • https://cdn.sqhk.co/miwavilusaji/jgiii7f/54402515227.pdf
    • https://cdn-cms.f-static.net/uploads/4407331/normal_603aae113de15.pdf
    • http://aduo5.online/fajajagupikarebawibipogif9ydx.pdf
    • http://fasad-dom.site/teladitutifibixepipuk03ot.pdf
    • https://cdn.sqhk.co/novitovikor/5jeheLB/zegigujufimuloxawofomo.pdf
    • https://fojanatixisi.weebly.com/uploads/1/3/4/2/134265346/fixopagugogemu.pdf
    • http://fewomazojuxed.iblogger.org/21368865496.pdf
    • https://cdn-cms.f-static.net/uploads/4453334/normal_6032302c2cd27.pdf
    • https://cdn.sqhk.co/feletitami/XsgeYpp/followers_and_unfollowers_instagram.pdf
    • http://leftoutclub.com/tajatunegejiteoi09e.pdf
    • http://bonboxstudio.com/32533152114bsjfa.pdf
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fca03bf487a6.pdf
    • http://fimokeroda.22web.org/84641531612.pdf
    • https://static.s123-cdn-static.com/uploads/4384143/normal_5ff50c59e7f89.pdf
    • http://zexupopudoxop.iblogger.org/54313232112.pdf
    • https://vavivaso.weebly.com/uploads/1/3/0/8/130873957/mulodomexonud.pdf
    • http://specialsale.info/sazunekeahgc2.pdf
    • https://cdn.sqhk.co/moturalogupe/NWnu9gh/tuzanafuxejeduriwabot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vewajelawukos.rf.gd/2282118998.pdf
    • http://laraditinazeviv.rf.gd/net_exam_preparation_books_for_computer_science_and_applications.pdf
    • http://bajipenu.epizy.com/14995825849.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2dc.bin
34ff3dad409ad8752128dcf4d2c400179cbebc44763d7024b97aff5d7c675fd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DC 4512 bytes
font_01_sfnt_off0000f289.bin
9885ca9dddfb596e2cb634b4197825936f97eb930d63fc4dfcf2d8bee06a5c2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF289 5760 bytes
font_02_sfnt_off00010644.bin
fd779f94ba402ec73aa5e6beb67284151e5dac83a04001bae0faac9bfc75a0af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10644 20984 bytes

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