Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f77721f3a80ea2…

MALICIOUS

PDF

82.2 KB Created: 2021-05-08 09:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b3d8a58e4b0e8cae2056c4cdebbc053 SHA-1: 260bcc0d86e1ef551e8391511c961ecbecd7b451 SHA-256: 99f77721f3a80ea22d534a2f0c92a9fb4281573f8a434de807daddfe5e54a1b7
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV and an ML classifier as malicious. The document body, though heavily obfuscated, appears to be a lure related to song lyrics, likely intended to trick users into clicking the embedded link. The presence of embedded URLs and the high risk score suggest this PDF is designed for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=billy+joel+matter+of+trust+lyrics+meanings
    • https://cdn.sqhk.co/zifalulog/PMShdhg/82735168676.pdf
    • https://cdn.sqhk.co/bofagenined/jdljejf/71732841553.pdf
    • https://cdn.sqhk.co/sururezog/ihftXXD/tangled_doll_disney.pdf
    • https://cdn.sqhk.co/babonisu/hih33Uz/runecrafting_guide_rs3_f2p.pdf
    • http://naxiramomamaz.66ghz.com/traxxas_stampede_2wd_body_mounts.pdf
    • https://cdn.sqhk.co/fakineduxafe/jfwKSJC/blue_fast_runner_city_hedgehog_sonic_boom.pdf
    • https://cdn.sqhk.co/letonolomo/URPEiiT/easyshare_wifi_file_transfer_for_pc.pdf
    • https://cdn.sqhk.co/pefisemise/tcDgehj/paralyzed_nf_piano_tutorial.pdf
    • https://cdn.sqhk.co/xewafazuk/jgwhfhi/zewenuneje.pdf
    • http://zitarekatinupas.sportsontheweb.net/17559606623.pdf
    • https://cdn.sqhk.co/sebixodof/iBigg97/chocapic_shaders_1._8.pdf
    • https://cdn.sqhk.co/gulanuwe/tgfihE1/4119519475.pdf
    • http://jibinomazovujug.22web.org/reporter_questions_for_interview.pdf
    • https://cdn.sqhk.co/kapudome/W4Kjbgj/xurubok.pdf
    • http://zolepop.mypressonline.com/carcinoma_papilar_de_tiroides_tratamiento.pdf
    • https://cdn.sqhk.co/zerurukoraju/PjegAic/26218561607.pdf
    • https://cdn.sqhk.co/poronujefino/hj8avge/53914434148.pdf
    • https://cdn.sqhk.co/sobupepokor/hd4Wq53/95960199475.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xirofapinowud.atwebpages.com/gramatyka_angielski_matura.pdf
    • http://wekijedi.epizy.com/83945746675.pdf
    • http://sutexuvidag.myartsonline.com/how_to_plot_a_gradient_vector_field_in_mathematica.pdf
    • http://tujijekaxevon.rf.gd/question_answers_of_chapter_7_packing.pdf
    • http://bonizeza.epizy.com/pomabenetizususubaxita.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_off000102e9.bin
f559dfdce80921f115971cc4893b6260fe7f9b3040a7dc87b07513f56228d3ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x102E9 5428 bytes
font_01_sfnt_off0001155f.bin
b9103da6c4443a9b9d3666f438d05edc2f260480b710ebe683633403afca3668
pdf-font-stream PDF embedded font (sfnt) at offset 0x1155F 11056 bytes