Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7250a0e613ff32d…

MALICIOUS

PDF

90.7 KB Created: 2021-02-19 14:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 631c8959dbc82cc3d68c1a9089b70d5d SHA-1: df0588a7d21382828d62a33aa0f972c46de6e8fe SHA-256: e7250a0e613ff32d4b6e03fffd5e4cdbb23461715167c776a1fed8c1d8753320
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, with one prominent URL pointing to a site offering 'free games for children'. This is a common lure for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a trojan. No scripts were extracted, but the presence of multiple external links suggests an attempt to redirect the user to a malicious site.

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
  • 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://maypoin.ru/strik?utm_term=juegos+gratis+para+ni%25C3%25B1os+de+vestir+a+hombres PDF link annotation
    • http://xinupavob.iblogger.org/zaduviwurisivoxoforo.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/86139484696otmxx.pdfIn PDF document text
    • http://gallery-shop.site/76142895607e78x7.pdfIn PDF document text
    • http://weareanonymous.org/lazimumabomiw86ung.pdfIn PDF document text
    • http://damvglaz6.xyz/what_is_the_samsung_smart_remotetizjb.pdfIn PDF document text
    • http://ru-dev.xyz/how_to_make_symmetrical_art_on_procreatel0ouw.pdfIn PDF document text
    • http://xozanos.iblogger.org/breaking_bad_episode_3_parents_guide.pdfIn PDF document text
    • http://goossyy.online/commando_2013_full_movie_1080podmmc.pdfIn PDF document text
    • http://ptmonline.ru/dineropafmu1e.pdfIn PDF document text
    • http://doorstepcomputers.com/nibajepup1qz00.pdfIn PDF document text
    • http://zujakupuk.22web.org/status_epilepticus_treatment_guidelines_2012.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tewilojejesuj.epizy.com/attachment_style_theory.pdfIn PDF document text
    • http://xexelakufakeze.epizy.com/cisco_packet_tracer_new_version_free.pdfIn PDF document text
    • http://gobewodekopatu.epizy.com/rorebodekelar.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_off00012205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12205 5740 bytes
SHA-256: 1cae575c6ea95628ebf31675c2e31064015cda4187c30a899a5fc7c6fa665813
font_01_sfnt_off00013519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13519 11892 bytes
SHA-256: bdce8758a16e10b6972dd97441fa973e8b402f4e1c87dee38647abeb1f6d08b2

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