Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a63634a12a5cb60…

MALICIOUS

PDF

77.0 KB Created: 2021-03-19 13:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 621b1079068bf92158f2914973ee2924 SHA-1: 714338c73af348120c74d337732ff5ce757bcb9e SHA-256: 8a63634a12a5cb60c59b490881d77657bfac802c252f32df25aadb761bfd6e88
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ML classifier and ClamAV, with a high risk score. It contains an embedded URI pointing to 'ponafet.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'best served cold pdf'. No scripts were extracted, but the presence of external URIs and the malicious verdict strongly suggest an attempt to redirect the user to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=best+served+cold+pdf
    • http://meetsoda.pro/ti_89_titanium_statisticstds2h.pdf
    • http://jazabezul.iblogger.org/what_are_professional_ethics_of_a_teacher.pdf
    • http://alluniversity.fun/asphalt_8_apk_obb_apk_awardox59m.pdf
    • http://women-ita.space/jezavigovasugug9chzx.pdf
    • https://cdn.sqhk.co/leluforeref/hg25jit/wuzojosuferunepasoj.pdf
    • http://naturaitalia.space/tawekizobulukibenobqvt9o.pdf
    • http://oneitshop.info/free_will_template_ireland3pfgi.pdf
    • http://hermidkovo.info/bosch_1617evspk_wood_router_australiacns27.pdf
    • http://helplnstagramcontact6088758.com/exo_terra_terrarium_lock_instructionsw9pqj.pdf
    • https://cdn.sqhk.co/lojibuwe/hjtFhd2/lirolan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuvovoxigumuz/vibedanosazojazirikabaxu.pdf
    • https://s3.amazonaws.com/vudivuzakal/31771366635.pdf
    • http://nadadeze.epizy.com/kavivu.pdf
    • http://xupebina.epizy.com/is_there_any_romance_in_samurai_champloo.pdf
    • https://s3.amazonaws.com/jedobufudajewu/corrugated_bitumen_roofing_sheets_uk.pdf
    • http://lijebufu.epizy.com/john_deere_250_skid_steer_quick_attach_parts.pdf
    • https://s3.amazonaws.com/xijuxosisomuna/major_landforms_around_the_world.pdf
    • http://muzokusadozejog.epizy.com/gavaxogumanawatilunobak.pdf
    • http://dikawuferiwa.rf.gd/smart_car_repair_manual_2008.pdf
    • http://verizukavorili.rf.gd/forbidden_archaeology_free_download.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_off0000f158.bin
26ebd9593536b156d1f972cd677f31a82ee06fd088d68c9b2eb767d656aa3186		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF158 5048 bytes
font_01_sfnt_off000102a6.bin
c2e4c490662415c94c6614e7365353fbbaff564196f1247abf1be0e8f0f58f5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102A6 10584 bytes

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