Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ef18d3b6188465…

MALICIOUS

PDF

87.6 KB Created: 2021-03-13 21:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ba82fc379af6283537780f8486db71d SHA-1: 446e42acb7ebfba246419f37427a230737e9acb1 SHA-256: 03ef18d3b6188465a486e3f02035b5492d09bb0b2650b302ed6260a0b34ee368
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this, flagging the file as malicious and a phishing trojan. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://bologen.ru/wix?keyword=kotor+2+companions+guide
    • http://xitodefigatefuj.medianewsonline.com/23418008798.pdf
    • http://sizegivip.22web.org/cascada_de_coagulacion_vias.pdf
    • http://wajazenizur.mywebcommunity.org/woloperuki.pdf
    • http://nigasheff.xyz/paint_tool_sai_1.2.5_full_downloadtlv0x.pdf
    • http://ig-mediateam.net/palanurudukiladewida4z0ue.pdf
    • http://betmoy56.com/22216291597sizvy.pdf
    • http://fupemagis.mywebcommunity.org/french_for_beginners_book.pdf
    • http://nopotaz.medianewsonline.com/29682624162.pdf
    • http://in-arenas.com/inlay_router_templatesc8hhl.pdf
    • http://nesorus.mywebcommunity.org/16979139146.pdf
    • http://montana-media.com/how_much_is_a_kenneth_cole_new_york_watch_worthu7pm7.pdf
    • http://fionainthefield.org/712108054949q256.pdf
    • http://nakrutkavk.site/10224413706oo4yu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tososite.onlinewebshop.net/rugejavareviwasij.pdf
    • http://gumigojozupe.epizy.com/7975765823.pdf
    • https://5ccda086-29c7-4024-8a93-689df1f3b89c.filesusr.com/ugd/ed8107_c845973466ca4277af628f4d0d4bb3a2.pdf?index=true
    • http://filutirulone.epizy.com/jetulavufo.pdf
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_a9ac442bea9248a1b331cb40574f0108.pdf?index=true
    • http://pekafujojef.onlinewebshop.net/47292525230.pdf
    • http://wezovekoxawotez.rf.gd/les_affaires_scolaires_en_anglais.pdf
    • http://vilatelisoto.onlinewebshop.net/19403119031.pdf
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_ec866b0793d74648b338b9e8cf6b2588.pdf?index=true
    • https://1b3e2d6a-0348-4772-9bb2-16e56a761455.filesusr.com/ugd/7bcf02_de60816c764b4c0eb913d12a256d1697.pdf?index=true
    • http://tiluxusimutine.atwebpages.com/best_sci_fi_fantasy_books_on_audible.pdf
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_35fb1154c9974d7f9c53451a08d45767.pdf?index=true
    • 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_off00010d36.bin
c53ed972166f1700f642f1013aad22556b4244b794145431b1e9f15a4ace4c80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D36 5344 bytes
font_01_sfnt_off00011f44.bin
ded25fcc80449aef25e48d37e14bf1e426eebd974665930e938807c48987d3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F44 10344 bytes
font_02_sfnt_off000142b4.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142B4 4324 bytes

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