Malicious PDF — malware analysis report

Static analysis result for SHA-256 adfa92a57a0e668e…

MALICIOUS

PDF

62.0 KB Created: 2021-01-30 20:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 6e34ab4b9c5d5fe1d7ee8ce0d8bf8fe4 SHA-1: 385db62ba44af76cf93ef81505f44aebf9c91bc1 SHA-256: adfa92a57a0e668eaf40fde2fb955fe31e4682da61b8fe28521edc76f9208c23
194 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=anagram%20solver%20scrabble%20cheat%20words%20with%20friends In PDF document text
    • https://cdn.sqhk.co/bofilewidil/XB6Q9BE/xinesekuzinasusaje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414341/normal_5fcf6b0d80809.pdfIn PDF document text
    • https://cdn.sqhk.co/latipizi/NgAjgnS/voicemod_pro_free_trial.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiliziv/jj3tMTL/20390738974.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/ijheKct/kuxuxafarafexinuguxu.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/sdjdugc/85604920669.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/sirilagewuga/theri_background_music_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/basketball_jersey_template_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/suvezutanodewom.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/bangla_sad_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/indian_constitution_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/98137215637.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/92164106507.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/allianz_malaysia_berhad_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/nutigexapanup.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_off0000b77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB77E 5716 bytes
SHA-256: 765ce508c2dce138e1157266debc0b83b9364132f511ea218f51c3f235572ec2
font_01_sfnt_off0000cadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADF 9348 bytes
SHA-256: f4dc1446632cf5811a9078ff71318f5580ab79860a5931cafdbecc17ebbf1202