Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7fce46cba3f7b27…

MALICIOUS

PDF

71.2 KB Created: 2021-03-03 02:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 13a2186b4e67459fac1acaf578a705bc SHA-1: cf967f7f325414652200ebb3ef97e923a337cdc9 SHA-256: d7fce46cba3f7b2793d21348d68434a5417abf02e89e942391818f40d458fb6b
136 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a browser extension installation lure. The embedded URL `https://pelibifir.ru/wix?keyword=apk+downloader+chrome+extension` strongly suggests the document's purpose is to trick the user into downloading and installing a malicious browser extension. No scripts were extracted, but the PDF structure and embedded URLs point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://pelibifir.ru/wix?keyword=apk+downloader+chrome+extension PDF link annotation
    • https://cdn.sqhk.co/xuluriwu/aiiuAii/lara_croft_relic_run_mod_apk_rexdl._com.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/download_strongs_concordance_kjv_bible.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496216/normal_5fc7dfeaf0bb8.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/gigigja/pilot_flying_j_fuel_card_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/idBIUmk/artillery_definition_oxford_english_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/ija2Bhc/85806415518.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/warof.pdfIn PDF document text
    • https://cdn.sqhk.co/tegatiwuwax/WichcPn/vellody_raj_md.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404723/normal_5fc8b1ac0e339.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/FyHigx4/pooking_billiards_city_hack_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/duvetezoje/heibVhe/t-_rex_chrome_offline_game_dino_run_online.pdfIn PDF document text
    • http://rexuwoxaga.sportsontheweb.net/759123296.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/je2Rgim/xisapunupenow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415304/normal_6018f7dfbbca3.pdfIn PDF document text
    • https://cdn.sqhk.co/gesaxamadew/jrdJhaI/pappu_curry_ela_cheyali.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387427/normal_5fc927df89aab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB42 5528 bytes
SHA-256: ae5c77771ae627fcd02c141d09173e769b9912065ff63b47652ac47fe6427d98
font_01_sfnt_off0000edf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF4 10000 bytes
SHA-256: 8a4a0f12c713002c76918a4c32ddc35891befb2ba7fe6aecdaea813e1bdc878a

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