Malicious PDF — malware analysis report

Static analysis result for SHA-256 c275a16131bbc203…

MALICIOUS

PDF

72.1 KB Created: 2021-02-15 17:01:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 161909582300b19fb5300f5aae6127df SHA-1: 4660ba75ee295aaf1823bf785d792dd7d9b8759c SHA-256: c275a16131bbc20317b9ec0ad750eb4ffb639463785338c2321c501cf2320d7a
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI that directs the user to a suspicious URL, masquerading as a search result. This URL is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, with the embedded URL being the primary indicator of a phishing attack.

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
  • 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://jacksth.ru/aws?utm_term=how+to+set+time+on+a+adidas+watch PDF link annotation
    • https://cdn.sqhk.co/duxadikoti/gfiFXPv/apple_music_vs_spotify_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/lekuruzomef/iqhbhic/a7_quattro_super_car_speed_drifters.pdfIn PDF document text
    • https://cdn.sqhk.co/mofipife/ha7hcje/buwodagolata.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/egjhdjd/79873867813.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/igjgdgd/is_frndly_tv_available_on_apple_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/W9LTeQ3/radio_italia_anni_60_milano.pdfIn PDF document text
    • https://cdn.sqhk.co/patemugimej/sShjjfv/menuwitoxazuzigaxetuwijut.pdfIn PDF document text
    • https://cdn.sqhk.co/rilixuzewiv/jcThfoZ/king_rivals_premium_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_601b398249a5a.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/vIQihjd/wesutibalagam.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/e4CBDd5/43265505368.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/id6icFS/nivexexud.pdfIn PDF document text
    • https://cdn.sqhk.co/sufiwotag/Q4hbWVF/vutexiwanibozotimekariset.pdfIn PDF document text
    • http://klosheff.xyz/homestead_act_of_1862_worksheet_answbet24.pdfIn PDF document text
    • https://cdn.sqhk.co/tinodifozeza/iiphaIo/my_nails_and_spa_salon.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/mokamoba/uniform_civil_procedure_rules_part_36._7.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/nupoxima.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/vewujabif.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/grade_11_ib_chemistry_textbook.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_off0000dd77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD77 5104 bytes
SHA-256: 42be0aea01fc9769a5f607df1dab992dce74f557d5670ba1d442220e43e678b0
font_01_sfnt_off0000eebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBB 10672 bytes
SHA-256: c6eba1554608a34508908184844324fa2f5c1c5a8791b8e8a515c1cb533b5089

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