Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6963487655753b…

MALICIOUS

PDF

77.3 KB Created: 2021-05-02 12:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0e42fb7f20a17c225f785623edb597a9 SHA-1: 74a54ad17c8a5a341a31e04ecb58b2dba9b7a988 SHA-256: 8e6963487655753b29ca52c97c91ffa56736367a4c0ba55838083d5f48be1e5f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=interior+design+schools+in+tampa+florida PDF link annotation
    • http://xedeporib.medianewsonline.com/bunetozopege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402933/normal_6046569525b20.pdfIn PDF document text
    • https://cdn.sqhk.co/bowazeduz/JgjhiKG/descargar_tasty_planet_forever_para_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/jhMiiZt/infinity_train_simon_kills_tuba.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/jlsDt9E/18945567196.pdfIn PDF document text
    • http://vojemodipu.sportsontheweb.net/72882520119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403959/normal_5fe694592f7cb.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/ihhes43/wekudodekowekelerogulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saboveliga.myartsonline.com/zakefasekorezozadakileg.pdfIn PDF document text
    • http://giwamori.rf.gd/27954354841.pdfIn PDF document text
    • http://dodavofonov.rf.gd/st_caste_list_in_mp.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/tamil_movie_baby_songs_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/benaam_1999_movie_song.pdfIn PDF document text
    • http://bakalawakajade.epizy.com/zapizenev.pdfIn PDF document text
    • http://kobisatavapuw.epizy.com/uk_payroll_process.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/medical_appointment_card_template.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_off0000efb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB1 5504 bytes
SHA-256: 55af66fb89c14c9ae7212de7185acfd1a1929c5aaa1b11642c3beb0e325c99de
font_01_sfnt_off00010244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10244 11028 bytes
SHA-256: 26021b55faa935d30a0553f0be31389a7089c7b318579390ae3e62fd5216b9cd

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