Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e0c20f47d9afce…

MALICIOUS

PDF

83.4 KB Created: 2021-05-11 11:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ca5455eca622a18f93d1502e3dcf3c2f SHA-1: 2e70f11ea44f494b745dc350aa1875be51934769 SHA-256: 84e0c20f47d9afce4fb40b4e93fc100cd6694b2455351a27e8fe42254617fd22
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary lure pointing to 'fokemale.ru' disguised as a weight loss chart download. The document's structure and the presence of multiple disposable hosting links suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?utm_term=weight+loss+tracking+charts+printable+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370304/normal_5ffb66e7895a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404502/normal_6049a2bf3f6e1.pdfIn PDF document text
    • http://zinepifulew.22web.org/ximupadomugakolilulufu.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://losqutoq.online/carroll_county_arkansas_jail_reportw23qp.pdfIn PDF document text
    • http://copyrightsupporteds.com/81632156609p8vzp.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/planet_bike_protege_9.0_wireless_instructions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5fe89d3336be3.pdfIn PDF document text
    • http://help-igcopyright.xyz/3__slots_slots_slotsp4pjz.pdfIn PDF document text
    • http://jesibijifinuz.mywebcommunity.org/jobomu.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/great_love_story_book_series.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_601aa2f1ae88c.pdfIn PDF document text
    • http://kupivse.xyz/aksar_all_song_mr_jatt8aw0g.pdfIn PDF document text
    • http://poopo.ru/ranamododazukixopuvufv29jm.pdfIn PDF document text
    • http://exampl1214.com/997725444460d0tc.pdfIn PDF document text
    • http://kyukty68.xyz/462202894416eknw.pdfIn PDF document text
    • http://fibipowokogo.sportsontheweb.net/mukoxopepixuxotipibul.pdfIn PDF document text
    • http://iblack.space/is_caron_cakes_yarn_machine_washable8hsac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410418/normal_5fcf47c5d053e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roraxekabitapoz.rf.gd/varofexuriborukelezof.pdfIn PDF document text
    • http://kenozajawatulaw.rf.gd/disorelow.pdfIn PDF document text
    • http://lajefuvubesij.epizy.com/40050826923.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_off000105f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F9 5492 bytes
SHA-256: 437befcf7e5d1ae77d272e657d3d006668a70f15e840a751973730b64217e2d0
font_01_sfnt_off000118b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B4 11824 bytes
SHA-256: 2ebd5139088b14572315862837f61bc55b243cde94ed155f7edd3a24f5f0c8c5

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