Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca0d5f772751673…

MALICIOUS

PDF

82.0 KB Created: 2021-03-16 00:20:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 277aead28ec0038fac0db0842ae71c0f SHA-1: 7362710b25a75983582895961ce47306acbf6d50 SHA-256: cca0d5f772751673c6d1725f2c4f61b9c9ce010f808833f4935ac6f8b02d4ba7
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 identified as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru', which is likely a lure to download a fake application. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a search result.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://zajinet.ru/wix?keyword=fnaf+free+apk
    • https://cdn.sqhk.co/bajowekununa/zm6v6ie/how_to_save_my_bird_from_dying.pdf
    • https://cdn.sqhk.co/kagumuzom/zVicjeC/vubuzuxavazudutep.pdf
    • https://cdn.sqhk.co/loxusovi/e0ojiI3/swift_shocker_kite.pdf
    • https://cdn-cms.f-static.net/uploads/4445733/normal_6034cfc783dd2.pdf
    • https://cdn.sqhk.co/tujujelo/4agcHp7/logegup.pdf
    • https://static.s123-cdn-static.com/uploads/4448094/normal_5ffcaf5296d03.pdf
    • http://dubulus.iblogger.org/runabovitiverasikezubel.pdf
    • http://logefekur.22web.org/47869592243.pdf
    • https://cdn.sqhk.co/bunewonu/RiiMdgP/fashion_plates_toy_80s.pdf
    • https://cdn.sqhk.co/xagegegozi/4cjeAc3/47952074555.pdf
    • https://cdn-cms.f-static.net/uploads/4375093/normal_602c51c9116e2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4d4a5bed-37c5-4cd2-a2a4-efbf3e85c768/links_awakening_manual.pdf
    • https://s3.amazonaws.com/nuselufuzo/tcs_hr_interview_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/2b952f60-cb50-41d1-8795-6482cbee714c/ashtalakshmi_stotram_telugu_lyrics.pdf
    • https://s3.amazonaws.com/lijulijowivaze/brinkmann_zone_grill_manual.pdf
    • https://uploads.strikinglycdn.com/files/adf21c31-a95a-4425-ad55-013ae8daa3c0/82416412435.pdf
    • https://uploads.strikinglycdn.com/files/229e3ac1-be43-45c9-b54a-9d42d0313a88/pubujexamapepavoluzot.pdf
    • https://s3.amazonaws.com/bokofapig/eclipse_for_redhat_linux_64_bit.pdf
    • http://pojasosi.epizy.com/ya_fantasy_romance_books_2020.pdf
    • https://s3.amazonaws.com/rovikibixu/tigevoxexipigir.pdf
    • https://s3.amazonaws.com/jevedijadiki/voxozuvudovubimudakewuvi.pdf
    • https://uploads.strikinglycdn.com/files/1d23bdc9-1156-43ec-a804-8b410426dc7a/49728690382.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec27.bin
fb8a29377c1084329409107d4d34b7a9d222cfa33f88a4943d0966b05da80376		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC27 4704 bytes
font_01_sfnt_off0000fc41.bin
3d4bf1de9fdca0566e3773651ea2993d9c0f686ab9f787cb6e271da7a4c84f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC41 12740 bytes
font_02_sfnt_off00012423.bin
79c21de919837a471c86ec742a75355c09d3106ef2de5a5c5aec12223c3e6713		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12423 16120 bytes

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