Malicious PDF — malware analysis report

Static analysis result for SHA-256 72815502794b5042…

MALICIOUS

PDF

79.6 KB Created: 2021-05-17 08:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a7ae81bb6389f6e24719862f67bd727c SHA-1: ee6cd7c131ba1ed7688c629e2bc20a81bdc21b9b SHA-256: 72815502794b5042e02147b0930b5e4c3221eb4825753953a3642a1b4dc3f5cc
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 0.9991

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://dugedepap.ru/strik?utm_term=stress+assessment+questionnaire+for+college+students PDF link annotation
    • https://cdn.sqhk.co/gedugari/rHgcCWP/survival_island_english_movie_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407989/normal_606c435269be2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501980/normal_5fdf11b8f3c90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475719/normal_5fef8627d14b5.pdfIn PDF document text
    • http://vevaroda.scienceontheweb.net/advantages_of_vehicle_tracking_system.pdfIn PDF document text
    • http://fonudesuwobulud.mygamesonline.org/xanafemepukimulekeza.pdfIn PDF document text
    • https://cdn.sqhk.co/rolekixawute/mxjcKxP/jogos_psp_cso_gratis.pdfIn PDF document text
    • http://murimubijejaba.mygamesonline.org/ielts_vocabulary_booster.pdfIn PDF document text
    • http://fetesitomer.mygamesonline.org/bevobix.pdfIn PDF document text
    • http://fiwisud.getenjoyment.net/safeway_catering_menu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373985/normal_5ff06d4409564.pdfIn PDF document text
    • http://xijipeva.mypressonline.com/bagukojogomofeloxu.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/gPZ2u3j/5785823118.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466161/normal_5fcd30df83b0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://godusisoti.onlinewebshop.net/lakifozepunegovapivuzu.pdfIn PDF document text
    • http://rewuwuja.onlinewebshop.net/xakujise.pdfIn PDF document text
    • http://muvamubas.atwebpages.com/pobutupu.pdfIn PDF document text
    • https://a86b13d2-a9ad-4039-ad74-10d2f7332aba.filesusr.com/ugd/6e2451_7167f262a56b46268dbb0ee81c2cd0ec.pdf?index=trueIn PDF document text
    • https://3a7b682b-4b85-4b21-836a-a34929c8735b.filesusr.com/ugd/0cd3a8_b10c2eb4a707427bab1173c6c01bbef2.pdf?index=trueIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/software_project_risk_management.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_b7d452204e1542d7a84d7d364572252c.pdf?index=trueIn PDF document text
    • http://wodowepakimeko.onlinewebshop.net/business_case_free_download.pdfIn PDF document text
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_ac165110ee274b53ad8c740d8f616f03.pdf?index=trueIn PDF document text
    • http://todifisafi.atwebpages.com/arya_samaj_marriage_application_form.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_off0000f7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B5 5572 bytes
SHA-256: dc3b960cd513b9c30c6098e4721bfbdec5d731c425772d163231400fc7e89d86
font_01_sfnt_off00010a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A84 11060 bytes
SHA-256: c0cac990659ef05d2a19a999e8ad68d4a19d319143750a51f46cfacaa00a164c

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