Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d730ffd8079730…

MALICIOUS

PDF

77.7 KB Created: 2021-03-14 20:51:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 71f5ce7efd6cbeabddf7c9eb5df9eeae SHA-1: aab37f4d341dd2d638feb97f08008b2cc3f5da6a SHA-256: b2d730ffd8079730368a232ffe1c83142cc3f7b8e47f465ed01ac18fe223d3e7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/award?keyword=applied+mathematics+2+kumbhojkar+pdf PDF link annotation
    • http://tagoturuluro.medianewsonline.com/72157251428.pdfIn PDF document text
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/9640262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473375/normal_602b9629d9237.pdfIn PDF document text
    • https://wasatetokis.weebly.com/uploads/1/3/4/5/134513062/fb93909ef41fd97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501794/normal_5fff7f16c5c7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408319/normal_603b82b458cba.pdfIn PDF document text
    • https://balesiloruj.weebly.com/uploads/1/3/4/6/134671801/terenu-xafubisunun.pdfIn PDF document text
    • https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/4354001.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/the_endless_game_movie_rotten_tomatoes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481278/normal_603d2c211b44c.pdfIn PDF document text
    • http://muvepifare.mygamesonline.org/as_time_goes_by_sheet_music_free.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/mirokusafonenewabuxij.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/how_can_i_stop_mindless_eating.pdfIn PDF document text
    • https://fanuterose.weebly.com/uploads/1/3/3/9/133999321/0b25bada1717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481699/normal_60243c652e524.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/85880538774.pdfIn PDF document text
    • http://vakakuwumegus.22web.org/mujolelijowatoje.pdfIn PDF document text
    • http://tolejif.22web.org/99126480186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408709/normal_5fda63bd88276.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuputes.atwebpages.com/vita_3d_shade_guide_order.pdfIn PDF document text
    • http://tunadexemuvaru.epizy.com/elementary_linear_algebra_7th_edition_solutions.pdfIn PDF document text
    • http://lofoxos.epizy.com/xesepegevuxu.pdfIn PDF document text
    • http://temodorofeg.atwebpages.com/toxolagitupasetebop.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/jiririgozufow.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_off0000f0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FF 5796 bytes
SHA-256: b463280f0c622d30d3b8576108ad6f6e8e9e0a12e29c95ca860f9227c30e930b
font_01_sfnt_off00010490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10490 10716 bytes
SHA-256: 9d239f4867c9c5de62f60cba45271aadc52ec58a122093ed2b928f592463e69b

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