Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d6b05bccac9b6b5…

MALICIOUS

PDF

85.8 KB Created: 2021-03-10 17:48:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5e6dace5d6c3f950d9dbf218468c93a2 SHA-1: aed2aa29662e948d25bc6fb7f9173e50e1aceaed SHA-256: 8d6b05bccac9b6b5449a4d64444c82d77896d497a7a31b20a60684edee49b5a6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic specifically flags it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

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://vilenefex.ru/123?utm_term=online+calendar+template+2018 PDF link annotation
    • http://kukushpa.fun/add_canvas_to_imageview_androiddp5x4.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/40206935619.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/jcajbic/21197550248.pdfIn PDF document text
    • http://wozekozexufoxol.scienceontheweb.net/jejelikadonisolivi.pdfIn PDF document text
    • http://drilltech.info/48053744211joz9a.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/JLibhbm/nidotibasipofunifen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446772/normal_603e275a75cb4.pdfIn PDF document text
    • https://cdn.sqhk.co/dugudumopup/iejaCja/monster_hunter_world_companion_gadgets_plunderblade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393515/normal_5feda2084c717.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/56349475183.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/jjcifjg/sheetrock_experts_mn.pdfIn PDF document text
    • https://cdn.sqhk.co/dubagelojuwe/d1kjfid/gunship_strike_3d_mod_apk_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486548/normal_5ff0a479328fe.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/how_to_power_on_tablet_without_power_button.pdfIn PDF document text
    • http://viteroludobano.mypressonline.com/how_to_reset_a_magnavox_tv_remote.pdfIn PDF document text
    • https://cdn.sqhk.co/favejofu/Yhgiaa1/battles_european_theatre_world_war_ii.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461207/normal_6029d666658aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393041/normal_60450e4b52ef9.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/66692994829.pdfIn PDF document text
    • https://cdn.sqhk.co/sevalaturi/fkzKq3A/trendy_gacha_life_bad_boy_outfits.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/hj2nfjg/mars_new_life.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://totuxivez.onlinewebshop.net/how_much_weight_is_3000_calories.pdfIn PDF document text
    • http://girofili.myartsonline.com/how_to_connect_samsung_xpress_m2070w_to_wifi.pdfIn PDF document text
    • http://bidajalej.onlinewebshop.net/science_journals_free_download.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_off000110d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D5 5588 bytes
SHA-256: c2a52646f7a365e0febb4e912121358cecdeb75d0153c39683e13fd5dd5dd85f
font_01_sfnt_off000123bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BF 11220 bytes
SHA-256: b92284e6ab189785e141c5ff8d3ad673d919b5cf576fa0a6da35a4fe9db92a2d

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