Malicious PDF — malware analysis report

Static analysis result for SHA-256 12cfe14fb5c5beaa…

MALICIOUS

PDF

72.6 KB Created: 2021-03-15 21:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c06b8a3ab89d47afbf8720c147359b9 SHA-1: 920b9d212c14ee4ec2dac812bbf5dbab06320ef0 SHA-256: 12cfe14fb5c5beaaf0d27ba0a4e58f2d47fb7e96173a7e0964aee5b02c4b3ea5
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'crophysi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'P21s wheel cleaner australia'. No scripts were extracted, but the presence of external URIs and the malware detection strongly indicate a malicious intent to redirect users to harmful 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://crophysi.ru/strik?utm_term=p21s+wheel+cleaner+australia
    • https://cdn-cms.f-static.net/uploads/4408321/normal_6042d678b2426.pdf
    • http://sberbank.link/modern_british_novels_for_high_school_students9b59j.pdf
    • http://adanakebap.org/voxogepamizam5ulfu.pdf
    • https://cdn.sqhk.co/nazutupim/jLc2dhd/major_mayhem_apk.pdf
    • https://cdn.sqhk.co/lekusovu/k9higfs/my_first_piano_adventure_writing_book_b.pdf
    • https://cdn.sqhk.co/liripudeb/hhH2fic/blackpink_square_one_album.pdf
    • https://cdn.sqhk.co/zanewijepex/pbpciit/40807498903.pdf
    • http://idem-peshkom.ru/litozemuihryx.pdf
    • http://swiss-family.space/9257723252laamu.pdf
    • https://cdn-cms.f-static.net/uploads/4453719/normal_601cdcf40cd18.pdf
    • https://cdn-cms.f-static.net/uploads/4455179/normal_6010fedf90259.pdf
    • https://cdn-cms.f-static.net/uploads/4417308/normal_5fd3d13c14e6c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/povelenavuviw/how_to_sort_sheets_in_excel_2007.pdf
    • https://s3.amazonaws.com/gasodamuza/thank_you_letter_for_mentor_template.pdf
    • https://s3.amazonaws.com/zagubip/earl_nightingale_reads_think_and_grow_rich.pdf
    • https://s3.amazonaws.com/vuraradaso/jotujubenezatonu.pdf
    • https://s3.amazonaws.com/xoferuzu/kudukavesomuki.pdf
    • https://s3.amazonaws.com/divexikav/52074457517.pdf
    • https://s3.amazonaws.com/bisegilupuf/98100722703.pdf
    • https://s3.amazonaws.com/jokotaziweluge/2128154611.pdf
    • https://s3.amazonaws.com/jazamerijekufol/17842441912.pdf
    • https://s3.amazonaws.com/pululusodogi/adobe_photoshop_cs5_full_free.pdf
    • https://s3.amazonaws.com/nijudow/the_lottery_worksheet.pdf
    • https://s3.amazonaws.com/lebejos/tusakiwubuvekitosolavo.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_off0000df09.bin
7beefb917005e8d12d1a4237fd0fa4a62d7bf5f1bf19e6dc4317c090d19a3ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF09 5164 bytes
font_01_sfnt_off0000f0aa.bin
38420f7d2e3d60bce4178ebe98bd2e481c962ea878fdee783f7a576a7aa1e428		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AA 10920 bytes

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