Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0a47436a2dfb11…

MALICIOUS

PDF

74.6 KB Created: 2021-03-10 06:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3de9c008188560ea7298b687828be889 SHA-1: d1aa57a8215ef2d5876c25a6e56f54369d27f216 SHA-256: 7b0a47436a2dfb11e69f4c508d6d8e7e63676d3c835d436d1eb64455d8c6216f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a site offering an 'award' related to the document's apparent topic. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a malicious intent to distribute or redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/award?keyword=bearded+dragon+care+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5fd0e74898a60.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/stormie_omartian_books_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468289/normal_5fdddcd764d45.pdfIn PDF document text
    • https://faxomozux.weebly.com/uploads/1/3/0/7/130775398/kinapepamiv.pdfIn PDF document text
    • https://sobidoduwipiver.weebly.com/uploads/1/3/1/4/131406433/pamulobuve_reputeme.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/42857531084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470402/normal_6018c14cea6c8.pdfIn PDF document text
    • https://dutosagow.weebly.com/uploads/1/3/0/7/130775111/ximares.pdfIn PDF document text
    • http://punejew.mygamesonline.org/who_is_the_most_influential_person_in_us_history.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/cOggijc/star_wars_battlefront_heroes_tier_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_6011a80251d47.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/fXKvheT/tujuguzunabububove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_5fe8bcea908af.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/mjgza9L/95178668022.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/xopujebipisabife.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/lajix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gajutar.onlinewebshop.net/rumafagiwigemalerasage.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/82770447166.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/fading_like_a_flower_sheet_music_piano.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/true_colors_test_blue_gold.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/razularibenotugetu.pdfIn PDF document text
    • http://mawokale.myartsonline.com/storytelling_system.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_off0000e921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE921 5160 bytes
SHA-256: 10bd0653c185f5dc4363d789e2262c41171cc66a7b1b07bad6908e55082491dd
font_01_sfnt_off0000fac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC5 10016 bytes
SHA-256: 85c1938c7a6f3e88f6c0d0ef03b4d4c8a6038024ae934d15e143cabd929e931e

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