Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb586a9a41857999…

MALICIOUS

PDF

77.1 KB Created: 2021-03-27 19:22:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fc5f2d6d9b7ec606f0bb6d14ba1c1d9 SHA-1: b4fa693dea1c669a770d71081e53193dc10ba6be SHA-256: cb586a9a41857999469bd90f8cd2c5805623a80e1b2685d8c5bb90c97e3058ae
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, and ClamAV detection confirms it as malicious phishing malware. The document body, though heavily obfuscated, suggests a lure related to 'answers to wsj crossword puzzle'. The presence of multiple external URLs indicates a phishing attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://golowaki.ru/123?utm_term=answers+to+wsj+crossword+puzzle
    • http://wisecredit.info/crazy_love_book_and_workbookx9u5n.pdf
    • http://beautysss.site/why_doesnt_my_apple_tv_remote_volume_workziw3t.pdf
    • http://fb-ig-copyright.com/estructural_funcionalismo_exponentesno01u.pdf
    • http://fit-italy.space/dnd_5e_artificer_2020pa8my.pdf
    • https://zodajuxos.weebly.com/uploads/1/3/4/2/134235393/2102290.pdf
    • http://brumbum3.xyz/when_meat_is_gameydr6e8.pdf
    • https://cdn.sqhk.co/jimatoju/cicMTgN/wuratajakodokatideze.pdf
    • http://boost-shop.xyz/retipo95zyg.pdf
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/mezivagadaf-furuj-wepuzilodipa.pdf
    • http://fb-ig-violation.com/24047297640qy6d6.pdf
    • https://cdn.sqhk.co/pevelefotuve/Vz7l4hr/mezosebekoju.pdf
    • https://kamilunumunubi.weebly.com/uploads/1/3/4/4/134486367/zakidixusemudetewo.pdf
    • https://cdn.sqhk.co/jirowolad/cvohdji/bovasuwumoni.pdf
    • https://dalenorilesa.weebly.com/uploads/1/3/4/8/134858788/kedulovipomogiweziri.pdf
    • http://mailedflkf.site/lomejazanevejen4bdl.pdf
    • http://center-san.ru/leon_nombres_dcimaux_cm10j9rg.pdf
    • http://serviceforyou.site/puzezifuxibukafujazecggzh.pdf
    • http://urologo.store/ava_max_all_songsh5y2s.pdf
    • https://cdn.sqhk.co/sowumavag/FiiVqia/sunday_school_lessons_for_adults_pentecostal.pdf
    • https://cdn.sqhk.co/dimusokobab/jcnhhgd/cute_animals_wallpapers_for_mobile.pdf
    • http://lavka-karamel.ru/how_to_use_canon_eos_rebel_t5_as_webcam4lwnp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/21829030-d3f2-472f-a788-c858ddf1459f/fexewa.pdf
    • https://uploads.strikinglycdn.com/files/2874c7fe-74d7-4c48-96fe-44ba7b09cfdd/zafimananizidigefela.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f8.bin
fb9aaf43434e94459754b97d8a44ee53761f69fd86185eacc5fb18722a596df7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F8 4896 bytes
font_01_sfnt_off0000f4d1.bin
3bb2d17c37d596f72e6d0ab43c107a7c9a6f9a9fad6a7d49d195734c019398f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D1 10616 bytes
font_02_sfnt_off000118a4.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118A4 4324 bytes

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