Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c13dcc5597b5e3…

MALICIOUS

PDF

109.8 KB Created: 2021-03-16 09:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30674c65e266c82abb7f62f306935eeb SHA-1: e5f008dd5d032a2d028ec2577c062a3ba7f92798 SHA-256: 55c13dcc5597b5e375284d023aca0de720f07df75e8811bbc607705c313cc97e
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. It contains embedded URIs that likely lead to phishing or malware download sites. The document body, though heavily obfuscated, contains references to 'Anfield football ground guide' and 'wkhtmltopdf', suggesting a lure to trick users into downloading a malicious file disguised as a guide. No scripts were extracted, but the presence of external URIs points to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/123?utm_term=anfield+football+ground+guide
    • http://pokemonrivals.online/judajuwazoxefufuraravivoz1as7d.pdf
    • https://static.s123-cdn-static.com/uploads/4387230/normal_5ff68453cfeef.pdf
    • http://table-wait.com/dark_souls_boss_guide_in_orderp5e6y.pdf
    • https://cdn-cms.f-static.net/uploads/4459175/normal_60258868b5338.pdf
    • http://sodaapp.club/places_accepting_furniture_donations_during_covid9dumc.pdf
    • https://cdn-cms.f-static.net/uploads/4461211/normal_6040564a1bbf7.pdf
    • https://cdn.sqhk.co/sunaxidida/Og8heB7/zibutavovugibututinatajo.pdf
    • https://cdn-cms.f-static.net/uploads/4413243/normal_6029667af2f9c.pdf
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/3050219.pdf
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/c9e63f51920f.pdf
    • https://pevunefimexog.weebly.com/uploads/1/3/1/0/131070247/lagowenoveturizizup.pdf
    • http://olivamebel.com/que_es_el_derecho_procesal_civil_romano0y89f.pdf
    • http://glasshookahcatering.com/navy_seal_training_camp_namev1hfs.pdf
    • https://cdn.sqhk.co/wedifedaguju/2heprha/kujar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/094134a9-5e29-463c-8a63-2642b5a7933a/sims_3_download_mods_folder.pdf
    • https://uploads.strikinglycdn.com/files/995e3f27-d56f-4f24-bb48-403490a2c7e4/loxukelizep.pdf
    • https://uploads.strikinglycdn.com/files/82ace735-d183-42ab-96bd-879aea79959b/how_to_fix_beats_wired_headphones.pdf
    • https://uploads.strikinglycdn.com/files/0ca98cae-03c4-48f7-953c-665aea9fa6f1/46752956739.pdf
    • http://jatuvujuf.epizy.com/kolisosizewedalekatipog.pdf
    • http://pemojam.rf.gd/2388673773.pdf
    • https://uploads.strikinglycdn.com/files/44d34478-d397-4a11-8061-ab5851e720be/que_es_la_literatura_segun_borges.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_off00016f50.bin
736fecd8125c06689e472ed8c24bf6e4a0726e867f77208a1b6ab865ec9481b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F50 5024 bytes
font_01_sfnt_off0001807c.bin
431d484489fcbac9f1d3eca2367d871996ef1f8a24924bbfe5c1daa75222ebcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1807C 12272 bytes

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