Malicious PDF — malware analysis report

Static analysis result for SHA-256 44164ce9425dd2d3…

MALICIOUS

PDF

79.9 KB Created: 2021-02-26 08:18:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5d13ed8de3ab32760d5e294d05f6bd1a SHA-1: 11021f9fcc3681147d0ced5ace7d9a8e24a9ada8 SHA-256: 44164ce9425dd2d3cff29b337b8558b5482f13d533840920bb0e30cb27243947
154 Risk Score

Malware Insights

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

The PDF contains a link that directs users to a malicious website, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic and the ML classifier flagging the document. The embedded URL is presented as a search result, aiming to trick the user into clicking it. No scripts were extracted, but the presence of malicious links suggests the intent is to lead the user to a compromised site for further exploitation.

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/award?keyword=how+to+draw+a+turkey+with+my+hand In PDF document text
    • http://axecheat5.xyz/profit_and_loss_report_in_quickeny5o19.pdfIn PDF document text
    • http://igme.site/bopadarh7q.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/eh7EEif/artillery_sidewinder_x1_v4_vs_v5.pdfIn PDF document text
    • http://supernefritroller.xyz/the_scarlet_pimpernel_chapter_16_summarygvyxr.pdfIn PDF document text
    • http://s7hmus.org/reformed_church_near_mefy1zp.pdfIn PDF document text
    • http://itawegan.space/where_is_steven_in_pokemon_emerald_sootopolis_citym6di7.pdfIn PDF document text
    • http://losqutoq.online/curse_of_strahd_level_guideo7asp.pdfIn PDF document text
    • http://mailedflkf.site/todadujefitoxavufokesoruvq0t94.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/divina_commedia_italianodw35p.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/tesasubawalozan/balakrishna_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/fegaxapitubagalujuzolam.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/cyber_security_newsletter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/rodikopejomilufotep.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/vehicle_check_sheet_app.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/company_of_heroes_cheats_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/5621555691.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/gesikuzixatiwotuw.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/animal_alphabet_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/ballade_pour_adeline_midi_file.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/bluetooth_headset_for_android_phones.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_off0000fe3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3B 5076 bytes
SHA-256: 14b6496eded975d34a1a8ce7e35a3d5d3a537af09cb38934eb1cdf31e0c52d0b
font_01_sfnt_off00010f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F65 10148 bytes
SHA-256: dfde6a8526adbe024a4b86eb3ef5a17ae52c2a20f6346770dccb44012832100b

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