Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6feac491a1cb1b2…

MALICIOUS

PDF

76.2 KB Created: 2021-03-19 03:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d2a28acffee8a4a33a40e6e723ffb3ad SHA-1: 4593d92dd1d1a0662e7ab1d42ea458b7a82ab005 SHA-256: e6feac491a1cb1b236a8b9cfe147c4508a3856480d6fdbd859c23e176fd4fae0
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one pointing to a suspicious domain ('botokaw.ru') that is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=sao+alicization+lycoris+how+long+is+chapter+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393190/normal_6044c9d15bdcb.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/above_the_line_urban_meyer_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458388/normal_605218f426a4a.pdfIn PDF document text
    • https://cdn.sqhk.co/solijisivono/Mijjhgj/calla_lily_planting_zone.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/noperodegasivimanikon.pdfIn PDF document text
    • https://tumolapeferuf.weebly.com/uploads/1/3/4/3/134363109/pisimopadi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453105/normal_601c85947750f.pdfIn PDF document text
    • http://pekibexuvipeve.scienceontheweb.net/list_of_synonyms_and_antonyms_for_ielts.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuzasana/BgcgiOF/sikugexuxifi.pdfIn PDF document text
    • http://japamawosoj.mygamesonline.org/pusazolusej.pdfIn PDF document text
    • http://terugate.mypressonline.com/photoshop_tutorials_from_basic_to_advanced.pdfIn PDF document text
    • https://xitipirobopu.weebly.com/uploads/1/3/0/8/130813988/dosewufeme.pdfIn PDF document text
    • https://mebijanuwirat.weebly.com/uploads/1/3/4/0/134042853/d8957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387918/normal_60453aa687706.pdfIn PDF document text
    • http://lagulesuko.medianewsonline.com/85424339164.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8a06cba-4245-4a9f-8275-986fa87a0e9c/golden_valley_pool_rules.pdfIn PDF document text
    • http://zutaturusix.myartsonline.com/76354683599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0a20269-0b3b-45b3-b445-96eef12f1eba/roland_micro_cube_gx_guitar_amplifier_red.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aeec6ac-fbcc-40d4-aead-a99f6b4aded2/california_case_citation_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd226dcb-4f52-4bce-9ce5-7a44644d0a1f/9245258864.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_off0000ec83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 5596 bytes
SHA-256: b7837d5c04148000b214e205a01417676ad4f06739d0440ebeb7067ae4bcbc26
font_01_sfnt_off0000ffae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAE 10564 bytes
SHA-256: ca5e50adf54d92d62a3be06b63fe6b5d89d918aab17d68a9e5ad1b7f88a13219

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