Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a12294a410f38e2…

MALICIOUS

PDF

75.7 KB Created: 2021-03-23 07:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1aa013652d39096fe8ea4a4b8c9e909 SHA-1: 28dc635b8d2466aa630f06bf80579bd1a2cf678b SHA-256: 8a12294a410f38e22ffe9dd3da7523abad15724c80734b1128896e6d45832e2b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, appears to be a lure related to reading development, directing the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/wix?keyword=chall%2527s+6+stages+of+reading+development
    • https://cdn.sqhk.co/zoluxoni/gT4jcPc/fire_flying_bird_pokemon.pdf
    • https://static.s123-cdn-static.com/uploads/4406789/normal_5ff77a5f8d21b.pdf
    • http://warajuvevuv.medianewsonline.com/christmas_carol_lyrics_book.pdf
    • http://parovosi.mygamesonline.org/business_plan_template_for_a_non_profit_organization.pdf
    • https://static.s123-cdn-static.com/uploads/4365536/normal_600515a1ce413.pdf
    • https://cdn-cms.f-static.net/uploads/4465685/normal_5fd30a14bb9be.pdf
    • https://cdn-cms.f-static.net/uploads/4449984/normal_6041a05f35c87.pdf
    • https://cdn-cms.f-static.net/uploads/4374360/normal_601f940677e11.pdf
    • http://tufuwavaziga.mygamesonline.org/sujovasuxulijimaxapa.pdf
    • https://cdn-cms.f-static.net/uploads/4456398/normal_604cfa3d7c4ca.pdf
    • https://static.s123-cdn-static.com/uploads/4423732/normal_60003852144f1.pdf
    • https://cdn.sqhk.co/lakabarobuk/givjbha/99541537031.pdf
    • https://static.s123-cdn-static.com/uploads/4475196/normal_5fe5b0d4f303b.pdf
    • http://tilosag.mypressonline.com/jivajunitidos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kizufalugomux.atwebpages.com/nutob.pdf
    • http://woxesizefibugel.atwebpages.com/ketasivejubiv.pdf
    • http://vewawisu.onlinewebshop.net/58974969418.pdf
    • http://pojoviraxerojo.myartsonline.com/all_greek_primordial_gods.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_off0000ea7d.bin
d7c1b301bdfa74bb2c2fa8adec7534ab8b7ecb8a77df796be529dc0fbbc4d973		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7D 5608 bytes
font_01_sfnt_off0000fd75.bin
84ca62e2f5bdc0b5f76484847d6c093acb1414016047c98f035fa1b0bf9f82e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD75 10556 bytes

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