Malicious PDF — malware analysis report

Static analysis result for SHA-256 85df5dc0f3122f5b…

MALICIOUS

PDF

73.7 KB Created: 2021-01-21 04:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c63c4cf7fa877fa56b5ca86e9e23dc49 SHA-1: 6db9969ff9897cdfe8c226503c20704fcccda48b SHA-256: 85df5dc0f3122f5bf102888b0603c8b24f2b76a9ba808b37e2c5ba6aeb3a60f9
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://trafffe.ru/123?utm_term=fifo+depth+calculation+in+vlsi PDF link annotation
    • http://vemasujananexu.22web.org/android_emulator_for_pc_to_play_games.pdfIn PDF document text
    • https://site-1174038.mozfiles.com/files/1174038/bevesirov.pdfIn PDF document text
    • https://site-1175796.mozfiles.com/files/1175796/intellij_idea_shortcuts_cheat_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389616/normal_5ff371952e0b6.pdfIn PDF document text
    • https://site-1172367.mozfiles.com/files/1172367/lalafuvoni.pdfIn PDF document text
    • https://site-1260899.mozfiles.com/files/1260899/runawajabudeworej.pdfIn PDF document text
    • https://site-1178683.mozfiles.com/files/1178683/76098595890.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/idrhiDd/daxaxuwiveg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/kojupodalefil.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/nebukamukovuvuras.pdfIn PDF document text
    • http://lokokojorivumi.rf.gd/cara_install_android_sdk_linux.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/skyfall_violin_sheet_music.pdfIn PDF document text
    • http://wetoxisifogif.epizy.com/binary_search_tree_program_in_c.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/dirapififujajarigisemano.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/zunureromosikuvaz.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_off0000dad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD0 5160 bytes
SHA-256: f616b382a32bf6b7adcfa300ada2bc6ce172c4be252e4c856a8b862f705a52dc
font_01_sfnt_off0000ec70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC70 13268 bytes
SHA-256: 3e2687ce52d209b2bfaaaee18caf2fc0f238aea5c2ab5095635930b6b115adb0