Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3614b449b7e36a…

MALICIOUS

PDF

146.0 KB Created: 2021-03-11 20:58:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9c70cebd60665a0badb0715a44fb818 SHA-1: 1d842f09c0ba2bbbcc3ebd7346de32d6fe7f4122 SHA-256: bd3614b449b7e36a4b58ad2f0105ea90c51b2a49dff71b2f1dade76f088467e6
104 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended for malware delivery or phishing. The document body, though heavily obfuscated, contains keywords related to 'bioaccumulation definition pdf' and application metadata suggesting it was generated by wkhtmltopdf, which can be used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://xezojetit.ru/award?keyword=bioaccumulation+definition+pdf
    • https://cdn.sqhk.co/tesigasefaxe/iaigthe/xevozeta.pdf
    • http://kekewawoxugar.sportsontheweb.net/9425410117.pdf
    • https://cdn.sqhk.co/rivotoxupow/jghhida/34351428418.pdf
    • http://rollernefritmassage.xyz/tsm_custom_price_strings1llp.pdf
    • http://nyvelsets.online/godly_character_qualitieso9xne.pdf
    • http://heliusdesign.ru/geronuxumefijeumo3g.pdf
    • http://lazirawolewok.getenjoyment.net/wepom.pdf
    • https://cdn.sqhk.co/baxijaxazixi/jgdq2hi/chess_game_free_app_download.pdf
    • https://cdn.sqhk.co/suvotoruwot/vgjhjjb/21096198854.pdf
    • http://load-bcp.com/9692861374923a0n.pdf
    • http://pumba.fun/heat_vector_quantity_or_scalar_quantityt5tsw.pdf
    • http://ribavid.medianewsonline.com/is_the_great_debaters_a_true_story.pdf
    • http://gisaxisiburu.66ghz.com/bivelinegezolaxeto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sakaburepagase/razorofogeruregefutaxu.pdf
    • https://uploads.strikinglycdn.com/files/9fd1643e-b91b-4759-9ecf-f9928222c164/janizemibobogovunajesaniv.pdf
    • http://bitines.myartsonline.com/10044701856.pdf
    • https://s3.amazonaws.com/vifusupegiza/fiction_story_elements_worksheet.pdf
    • https://s3.amazonaws.com/widetunipet/android_apps_builder_software.pdf
    • https://s3.amazonaws.com/suxiweke/87510225184.pdf
    • http://nebopujewewap.rf.gd/acr_guidelines_systemic_juvenile_idiopathic_arthritis.pdf
    • http://sorisavitekinuj.onlinewebshop.net/nezudivovopuvufuxum.pdf
    • http://bopebafelakab.rf.gd/26690077392.pdf
    • https://uploads.strikinglycdn.com/files/9c94d81e-8e13-4a69-86ec-9ae2799e95c9/judith_butler_gender_trouble_cite.pdf
    • https://uploads.strikinglycdn.com/files/fefbbb2e-350d-40f5-af72-751d77d61446/weregijatu.pdf
    • https://uploads.strikinglycdn.com/files/3ac8c07f-5b3e-4e2e-87c8-150dcf5711be/producer_to_producer_maureen_ryan.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_off000204a4.bin
532332150cf2dd5203a69ed2de0fddb16add19e05b7149df397c669e6dace678		 pdf-font-stream PDF embedded font (sfnt) at offset 0x204A4 5076 bytes
font_01_sfnt_off000215e0.bin
174905f49b2b69329e9746f5262040b25cd484dbe3c2f76adb806573d6e1495f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x215E0 10704 bytes

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