Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca80dee3c7b25336…

MALICIOUS

PDF

74.9 KB Created: 2021-04-01 10:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71ddd0341138de8ed9f43a2b63c2bf2c SHA-1: 21f2c3333d3cbb2642b3ed1fdaefe18148bf6ff4 SHA-256: ca80dee3c7b25336605fceac9b1f79f02032ac644b438dfad9d4f170547425d8
136 Risk Score

Malware Insights

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

The PDF document employs an advance-fee scam lure, presenting itself as information about cake writing to entice users to click on a malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL, https://pelibifir.ru/strik?utm_term=how+to+put+writing+on+a+cake, is the primary indicator of compromise, likely leading to a secondary payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://pelibifir.ru/strik?utm_term=how+to+put+writing+on+a+cake
    • http://mavito.online/homeready_framework_homeownership_quiz_answers6uxyc.pdf
    • https://marikikugawu.weebly.com/uploads/1/3/5/3/135326377/nuwib-rukegogone-falijofi-pirumininerud.pdf
    • http://hurricane1.space/football_manager_2015_steam_keyxsxkj.pdf
    • https://vurusewotuludi.weebly.com/uploads/1/3/0/7/130739344/keveguzatedapur-jedabakizu-firibuf.pdf
    • http://pitushok.space/versiculo_de_la_biblia_donde_pedro_camina_sobre_el_aguas8lku.pdf
    • https://xikewipevugid.weebly.com/uploads/1/3/1/3/131383679/54226bc745ff.pdf
    • http://bezprovodov.guru/dozikusuvazuvu26d1j.pdf
    • https://samukolapupe.weebly.com/uploads/1/3/4/0/134017142/xilumumikasube.pdf
    • http://bridgecommerce.com/dirt_devil_endura_max_xl_pet_bagless_upright_vacuum_reviewsokc5n.pdf
    • http://santaparker.store/mathematics_textbook_for_class_6_has_320_pages95ct1.pdf
    • https://kebonipima.weebly.com/uploads/1/3/0/7/130740513/d15d7015c.pdf
    • http://tophomework.space/wojezorinogezwfgt7.pdf
    • https://kajagutodadu.weebly.com/uploads/1/3/1/4/131437420/jozatiditifilotom.pdf
    • http://idealica-italiaofficial.site/luzakulisavidoodmzc.pdf
    • http://mavito.online/mathematics_worksheets_for_grade_6ovikr.pdf
    • http://podarokinsta.online/tipo_de_estudio_descriptivov4c0c.pdf
    • http://autobuff.xyz/zumem599za.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://badisaxutut.rf.gd/wuliverex.pdf
    • http://netomaniw.rf.gd/aeneid_full_text.pdf
    • http://posinumufupe.epizy.com/bobunivozut.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_off0000e8e0.bin
0bc5bab1bc56e12d0bc3435b59dd54f2372284911bdddd2673bc36bbe74966d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E0 5008 bytes
font_01_sfnt_off0000fa0f.bin
25461b31a8b9ab4829ffb8ce6a299179ca0f969e1fb154d4f94b4038fcaae321		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0F 10580 bytes

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