Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c39ab3c343f495…

MALICIOUS

PDF

76.1 KB Created: 2020-11-23 13:30:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7cc4727e54dbfe7c5dd4cd46f7c3df07 SHA-1: ad0c1e3cc46cd63f936296ae15d8308512233f13 SHA-256: b5c39ab3c343f495e495961a0d8f0146573eb7c49aa25a749b53f3bce2c6b982
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafftec.ru/strik?utm_term=daisy+1894+bb+gun+manual PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitatotol/office_administration_and_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e366c656-4aab-4684-82d9-6767ab978fc8/lewakujafix.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/xenixewetagat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d684e2a6-72a2-484b-8b5b-56a4cc01fc35/warcraft_3_frozen_throne_manual_patch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9373bd73-823b-49cd-ac8d-29821cf0b05c/51464152618.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/pipowazuzukisulotapuge.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/temavep.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/periodic_table_with_blocks_labeled_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5b6ce9-a544-48da-865d-7b8a8b32a838/pazulomopomirunud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c4fcbe6-6ead-4fd2-b53a-2147f4be6718/nufinup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ee28a8-c6f2-4e71-abe5-ea6c9a7768a3/49962107450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d87b42-6edf-457d-bdf2-bee60bd3d787/lilejinaxiwoworudeke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529d2b47-90e0-477f-841f-e5eca82554d9/lexis_nexis_advance_login.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/games_download_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab7d133-89ea-4840-a313-00c6697a926d/foripuga.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F7 5640 bytes
SHA-256: cf40c0c3ac7bfebeaaa510ab56fc23e2e6558692c463a9eb47d2193755907e36
font_01_sfnt_off0000fc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC33 11048 bytes
SHA-256: 4723c279afd102e4da4851b66e871ab5b84796c91088abc129eaa6fce2b45d40