Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b3c0716150f5226…

MALICIOUS

PDF

72.3 KB Created: 2021-02-07 01:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f63e51919475b62e886f186ac2f41493 SHA-1: 0ef38b04ffbfba170323311c5d417002b3cd0f42 SHA-256: 4b3c0716150f522656135b0cd936a19c7a7a6b94d1b214f6485843c8c5cd8405
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=adventurous+noun+form In PDF document text
    • http://drive4mclanemilwaukee.com/pojupixodekitoylaei.pdfIn PDF document text
    • http://basiditdcf.space/crush_them_all_best_staging_team5r7j1.pdfIn PDF document text
    • https://zorisurirumu.weebly.com/uploads/1/3/4/6/134600588/3208347.pdfIn PDF document text
    • http://cmbespaceclient.xyz/types_of_malicious_code0tmr4.pdfIn PDF document text
    • https://tisawisapapaw.weebly.com/uploads/1/3/5/3/135326074/1274726.pdfIn PDF document text
    • http://bluetea.space/zach_stop_vine_explanationbll56.pdfIn PDF document text
    • http://aycotoro7.xyz/programming_challenges_the_programming_contest_training_manualqp3qg.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/bugibupiwupixajezakafowugahc34.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/1jeoggr/nowisogijorubikekesojuwes.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/ibOjhja/pifumogizulejolo.pdfIn PDF document text
    • https://zetovesejideze.weebly.com/uploads/1/3/1/4/131482946/597320.pdfIn PDF document text
    • https://cdn.sqhk.co/jepipovi/dCuifvU/dota_underlords_wikipedia.pdfIn PDF document text
    • http://libertinemodels.com/lisugifa19vdj.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/ieQThen/trending_tiktok_videos_telugu_app.pdfIn PDF document text
    • https://cdn.sqhk.co/kejopala/jchgjdc/27077511688.pdfIn PDF document text
    • https://cdn.sqhk.co/nepofigiper/pGk6ihB/download_game_warriors_of_fate_2_ps1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wopugizejaru.rf.gd/54607111752.pdfIn PDF document text
    • http://pitolujebenim.epizy.com/bogalotudijigo.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_off0000db8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8E 4860 bytes
SHA-256: 0e1165c1d1898919070c525c6e46623ba5aaa783b41d59bdc2e8c79228c5a188
font_01_sfnt_off0000ec0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 12124 bytes
SHA-256: 8bd2d2d396c97bfebf678bbb3b0f9e6c11fc0947ba75e7aed6d47b05b59ec784

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