Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd037965bd03c47…

MALICIOUS

PDF

78.1 KB Created: 2021-03-25 14:14:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e65e150dfaef1e6c3e4f06d82b6ed022 SHA-1: 7793952816ab3f4ff96219c33dfc1720cdaf2f89 SHA-256: bfd037965bd03c473446229b9bce4d586c9f6c393b6f241cd14097124a6cc511
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'physical effects of bullying PDF'. The presence of numerous external URLs, particularly 'https://resalured.ru/award?keyword=physical+effects+of+bullying+pdf', strongly suggests this document is designed to redirect users to malicious content or phishing sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that this PDF is part of a larger network of malicious links.

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://resalured.ru/award?keyword=physical+effects+of+bullying+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423148/normal_5fd2d193a2ff5.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/dclaration_de_cession_de_vhicule_en_ligne.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/pedawivulopadas.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/ppMF9ge/379281135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479433/normal_601603a251d19.pdfIn PDF document text
    • http://getchambre.xyz/xijapazibidexifubuzerobolhq83.pdfIn PDF document text
    • https://cdn.sqhk.co/rakujolo/icLggDF/melomafir.pdfIn PDF document text
    • https://cdn.sqhk.co/tisezalave/XJqibjb/kifipoj.pdfIn PDF document text
    • http://allieshouseofhope.com/347713250458llvy.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/modifying_comparatives_worksheet84j9v.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/jexizijojonu9yh4n.pdfIn PDF document text
    • http://kutegexuwudaro.getenjoyment.net/12866400033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495042/normal_6026491a0f9c5.pdfIn PDF document text
    • http://zagozogenef.sportsontheweb.net/machine_learning_for_beginners_book.pdfIn PDF document text
    • http://slamelina.website/carrom_disc_pool_mod_apk_revdlo1o92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414864/normal_5fd3823c893c6.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/ChegtBZ/shark_attack_3d_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/ioqghoC/80054804708.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temolujipu.myartsonline.com/19775550483.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/zexajuwoguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/022cdd80-b962-4819-9ca4-5eb22446046a/bodys_3_lines_of_defense_against_infection.pdfIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/diagnostico_de_anemia_perniciosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb9686ea-6b30-4cb6-8948-99de78dda7ce/how_to_reset_harman_pellet_stove.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_off0000f2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B7 5564 bytes
SHA-256: bba4543ffcfe5cbd954e8fbb37cdeab119e79ca9bf99d7b9f108d00e845d8a95
font_01_sfnt_off000105ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AE 10968 bytes
SHA-256: 02c2d2f73f5bdf33e5509f71c5341330ff8b200e1e69bbd17547c017638f28ba

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