Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d16ef6abd1be383…

MALICIOUS

PDF

63.0 KB Created: 2021-04-09 17:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adcdbdf931329e7902c3522cc4d39507 SHA-1: b4c3a3cdca79acd88286a7c3d812e200efdfbed2 SHA-256: 6d16ef6abd1be383f4f4d501ab2a2308a92587324de587d18ea1fa271d50f97c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The primary URL, 'https://soxebez.ru/strik?utm_term=what+mental+illness+makes+you+hallucinate', suggests a phishing or scam attempt disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8526

Heuristics 4

  • 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
  • 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://soxebez.ru/strik?utm_term=what+mental+illness+makes+you+hallucinate
    • http://xiwakaravivomik.scienceontheweb.net/gejavowotikar.pdf
    • https://danexuxubusam.weebly.com/uploads/1/3/2/6/132695747/xiwogavuf.pdf
    • http://mukinumatonewo.getenjoyment.net/receptive_and_productive_language_skills.pdf
    • http://feremujidonigu.getenjoyment.net/arnold_schwarzenegger_bodybuilding_quotes.pdf
    • https://bevozuvegala.weebly.com/uploads/1/3/3/9/133999301/ginode_lemufeze.pdf
    • http://fubikopelemom.mypressonline.com/patezerinabi.pdf
    • http://sovolox.getenjoyment.net/derov.pdf
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/jasexewusiz.pdf
    • http://gifavojam.scienceontheweb.net/bosquejos_biblicos_para_jovenes_cristianos.pdf
    • https://xitemexum.weebly.com/uploads/1/3/4/3/134311382/6077338.pdf
    • http://xubajur.mygamesonline.org/nomenclature_of_tricyclic_compounds.pdf
    • http://vujuvisesakok.myartsonline.com/71704484105.pdf
    • https://uploads.strikinglycdn.com/files/ab8ecb61-bcc6-4459-8d3f-c98a743e6d5f/47396866822.pdf
    • http://nedizilunok.myartsonline.com/how_much_does_the_army_corps_of_engineers_pay.pdf
    • http://vawerudarasikow.myartsonline.com/panasonic_th_42px60u.pdf
    • https://uploads.strikinglycdn.com/files/2ae13636-c11b-49d4-9947-168ff47065e9/real_analysis_rudin.pdf
    • https://uploads.strikinglycdn.com/files/6d1dbe04-fb72-488c-8d25-ea94af9c4d2c/pulgadas_y_milimetros_de_llaves.pdf
    • http://jonesojawu.myartsonline.com/alcoholics_anonymous_big_book_4th_edition.pdf
    • https://uploads.strikinglycdn.com/files/424186e2-f1e8-4039-a47d-afb111fb93f7/goffman_presentation_of_self.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec5b.bin
a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5B 2900 bytes

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