Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d48cb52d68025bd…

MALICIOUS

PDF

79.9 KB Created: 2021-02-26 01:59:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 531db3ee8d9e32fada25024d450ccb70 SHA-1: 9d48b58881e656bb0028c3e1fec38e0cdd9d58f2 SHA-256: 9d48cb52d68025bd293190348d03bd4f97d03ff010326dbea057727ffe59f776
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=ways+iago+manipulates+othello'. ML classification and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, appears to contain a document title related to 'Ways iago manipulates othello', suggesting a lure to disguise the malicious intent. The presence of embedded URLs further supports the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=ways+iago+manipulates+othello In PDF document text
    • http://misiliv.66ghz.com/bhairavi_songs_masstamilan.pdfIn PDF document text
    • http://dodabefokibejo.22web.org/sparge_parole_wifi_cu_android.pdfIn PDF document text
    • https://cdn.sqhk.co/talegejusa/hbjjjfq/pobetofekubise.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/jzAkaf7/gafedigasenudokodamubeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejeseja/gufojomejidudipinil.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/vulobapagibugofugipovob.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/zozevesosaxe.pdfIn PDF document text
    • http://vitusaw.rf.gd/the_trials_of_apollo_book_5_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/jutosimokaxowapefawaxamu.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/31113876068.pdfIn PDF document text
    • http://lupemuvuxetamok.epizy.com/spanish_2_midterm_exam_answers_edgenuity.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/sozedugifobogevawapew.pdfIn PDF document text
    • http://vexukaxazixaxet.epizy.com/dds_discount_fresno_ca.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/mezosegovidarejeguk.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/burger_king_printable_coupons_july_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/70980985010.pdfIn PDF document text
    • http://kufawabizoz.rf.gd/70075177222.pdfIn 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_off0000fde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE1 5252 bytes
SHA-256: 900f4a1cca1d8e425e81f5f03621a30d804495c556b19c5feedf952308bfb834
font_01_sfnt_off00010fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAC 10176 bytes
SHA-256: 773eeeaa69fc91ea53c8377caa6d9065d03f7cf5e4201fe8aece9f7469f267bb

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