Malicious PDF — malware analysis report

Static analysis result for SHA-256 26cab8b40383942e…

MALICIOUS

PDF

104.9 KB Created: 2021-04-27 00:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72d7b21e61fb29af788374483e1ca925 SHA-1: bbcaeacb9356de80f2f7b9e2c2f12f233f6efdf7 SHA-256: 26cab8b40383942e9cf5d1a6afeaa9579a0769daaa6a6c71ba1b9b3955d161ae
136 Risk Score

Malware Insights

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

The PDF contains multiple suspicious external URIs, with one specifically noted as an invisible link to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of embedded URLs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://resalured.ru/strik?utm_term=how+to+disassemble+a+taurus+pt111+pro
    • http://com-login8.xyz/urfi_marriage_contract_forms4z7z.pdf
    • http://odemebayisitrafik.com/zolulisememuvoluroviesz68.pdf
    • http://heartcenteredequestrian.com/lepazemiburedaranovagtace5.pdf
    • http://braco.ru/legetewkc1z5.pdf
    • https://cdn.sqhk.co/pigexebobe/shjjeDy/45972944604.pdf
    • https://cdn.sqhk.co/xelalizogim/jbMgdOR/5_different_celestial_bodies_in_our_solar_system.pdf
    • https://cdn.sqhk.co/xarozowuzosa/7AfYA2f/woodshop_ideas_shed.pdf
    • https://cdn.sqhk.co/soxuvezosapa/WgjWShi/princess_full_body_spa_salon_madison.pdf
    • http://meetcabinets.xyz/modern_english_short_stories_onlineqrn91.pdf
    • https://cdn.sqhk.co/xoxamomajil/SmzGjj7/23326198179.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fosalizuzu/how_to_test_craftsman_19.2_volt_battery_charger.pdf
    • https://s3.amazonaws.com/safenalavojuwu/41663427436.pdf
    • https://s3.amazonaws.com/lopadivupudexa/bending_moment_shear_force_diagram.pdf
    • https://s3.amazonaws.com/bogeguva/97516160145.pdf
    • https://s3.amazonaws.com/sixenogafopoj/6248494349.pdf
    • https://s3.amazonaws.com/gekixadonuru/chalkboard_welcome_sign_template.pdf
    • https://s3.amazonaws.com/lupuvogotog/forrester_report_on_chatbots.pdf
    • https://s3.amazonaws.com/leteraxewe/gunenubewotogeren.pdf
    • https://s3.amazonaws.com/fowonaxul/modunanalez.pdf
    • https://s3.amazonaws.com/dudigonifu/27270177688.pdf
    • https://s3.amazonaws.com/bejideba/ffxiv_job_guide_scholar.pdf
    • https://s3.amazonaws.com/pasutiz/death_note_live_action_movie_2006.pdf
    • https://s3.amazonaws.com/genedonapubefe/tween_machine_maya.pdf
    • https://s3.amazonaws.com/kovezux/kexumefa.pdf
    • https://s3.amazonaws.com/vonusirukete/what_is_project_management_certification_pmp.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_off000158c6.bin
f8f72c3b6e66bfd590a06f424d9f0deaf3d0c9771f021ffe449b36e0ef0fd7c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158C6 5352 bytes
font_01_sfnt_off00016ae7.bin
b808e96df1b32178c91b514de2c75a5ef4436ee5ab2893ce5aac49a51f06993b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16AE7 12700 bytes

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