Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e280bdaa97257b0…

MALICIOUS

PDF

73.9 KB Created: 2021-03-20 06:35:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 837c02dfdb63ee9ee7964a3387529ad8 SHA-1: 9790c22275ce75db63606665ccf970fd00dc809d SHA-256: 3e280bdaa97257b09bbb888ac0d4aff0e02558bbc6cc0dcd25ec0674615cdae1
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to 'kindle' updates, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://nipisod.ru/strik?utm_term=how+to+update+2nd+generation+kindle
    • http://nosetibadap.iblogger.org/pogejatugumowetiz.pdf
    • http://tijukilebag.getenjoyment.net/fotifamuradovajukib.pdf
    • https://cdn.sqhk.co/guzupewad/iidjfJZ/bomimubuvizagoz.pdf
    • https://cdn.sqhk.co/zafazegig/cVf1jaQ/animated_love_images.pdf
    • http://kosamaritaj.getenjoyment.net/bunidaso.pdf
    • http://suvuxivenorum.mypressonline.com/1984_chapter_1_questions_and_answers.pdf
    • https://zoguripan.weebly.com/uploads/1/3/1/0/131070442/gawoveleduroxag.pdf
    • http://labifovejes.mypressonline.com/bringing_down_the_duke.pdf
    • http://potolkilife.ru/10111896637jyilc.pdf
    • https://cdn.sqhk.co/sesedazaw/TajihWs/the_diplomat_hotel_for_sale.pdf
    • https://jujuguzifise.weebly.com/uploads/1/3/5/2/135299578/jaxojodelawepeweronu.pdf
    • http://krokoboko6.xyz/felasobdjmtu.pdf
    • http://mnogoturov.com/wasaxazusiuvv29.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sijuvisa.rf.gd/discussion_method_of_teaching.pdf
    • http://tikimiwuwal.myartsonline.com/wendler_531.pdf
    • http://wojibikifi.myartsonline.com/gizezogawivunonaxokeb.pdf
    • http://fudapigoxuwumu.rf.gd/franz_liszt_hungarian_rhapsody_sheet_music.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_off0000e1a4.bin
a06ad6d818507128ebfd9422b5658d9391eff5c5b9665d8e58633afd9658a0c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A4 5196 bytes
font_01_sfnt_off0000f376.bin
8bc6f3c619ca2667d84181370a03343bc3e1516976760aa859702299405db0d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF376 10948 bytes

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