Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f92919a3b1e50b3…

MALICIOUS

PDF

87.3 KB Created: 2021-04-01 01:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d7573e9aaf6117e5d7e63f0492427090 SHA-1: 56a06f9cc364fdff0e70e235da5c1f65241d33bf SHA-256: 6f92919a3b1e50b33405bfedf5081b7eee8a75b8ce66899bcce227001485be50
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://jottigo.ru/award?keyword=android+studio+tutorial+espa%25C3%25B1ol+2020+pdf PDF link annotation
    • http://winoraama.fun/pazogaxizuwisorotaxefoxinadab.pdfIn PDF document text
    • http://nababaze.iblogger.org/hero_honda_carburetor_tuning.pdfIn PDF document text
    • http://wgathering.org/apple_ipod_classic_user_guide03892.pdfIn PDF document text
    • http://xadutewopitap.22web.org/what_skills_are_required_for_public_speaking.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/ieDWsjh/motogp_3_results_aragon.pdfIn PDF document text
    • http://energytik.net/butamubyen5b.pdfIn PDF document text
    • https://cdn.sqhk.co/tupujokuz/ihbgjii/45660265525.pdfIn PDF document text
    • http://lizixute.iblogger.org/cheat_engine_apk_untuk_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/fosikikevo/9jhViaV/96375077766.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/AagfRgg/nuvibokubaronapobutuvekop.pdfIn PDF document text
    • https://cdn.sqhk.co/rinilafexowi/gdfge8l/3581742015.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/gj1hjjg/attestation_assedic_particulier_employeur.pdfIn PDF document text
    • http://hook-up.fun/pelicula_100_aos_de_soledad_online_gratis3oqi5.pdfIn PDF document text
    • https://cdn.sqhk.co/zaperarori/kidIifM/17260083949.pdfIn PDF document text
    • http://grandov.pro/makeup_tutorial_videos2hn15.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://modabiwabilalu.epizy.com/89546057200.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/retolitegedon.pdfIn PDF document text
    • http://dabirojab.rf.gd/bogorawumapugetubozi.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/jacuzzi_laser_225_sand_filter_manual.pdfIn PDF document text
    • http://kifilexaxinazer.epizy.com/american_truck_simulator_1._35_full.pdfIn PDF document text
    • http://nedudumitariz.epizy.com/roman_architecture_history.pdfIn PDF document text
    • http://fokawodi.rf.gd/bewafa_hai_tu_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/advertising_discourse_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/71577941003.pdfIn PDF document text
    • http://xisapedugifado.epizy.com/gatavo.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_off00011778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11778 5512 bytes
SHA-256: c64f8a2e97f504ed6b678312cc05c7a682cb861a50fdd46aeb9dde0205929af4
font_01_sfnt_off00012a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A02 11396 bytes
SHA-256: 8e4e2969a6f6abfcd65ac140fc0a8b4a86003fade092102d430209c706f267aa

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