Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ab6ca3b4a86c06…

MALICIOUS

PDF

73.4 KB Created: 2021-03-20 20:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fd1ea78f1d8dcba0bb923e2feecc88c3 SHA-1: 97a3b17b92f14fe54c7bdc63d52663ffc5517e8a SHA-256: f0ab6ca3b4a86c065e60e8ae8243b0020d45d50b5573506333bf834f5086ac66
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 0.9996

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://vilenefex.ru/strik?utm_term=a+suitable+boy+netflix+trailer PDF link annotation
    • http://zesisoxesevi.22web.org/67649970265.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471250/normal_5fed608367762.pdfIn PDF document text
    • http://gnatural.space/street_fighter_4_unlock_characters_apkepltr.pdfIn PDF document text
    • http://gaximivotekole.mypressonline.com/particle_swarm_optimization_algorithm_matlab_code.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/painting_classes_near_me_for_toddlers.pdfIn PDF document text
    • http://vogudikomi.getenjoyment.net/lorubaxifubev.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/tixusepewiboxavuvofifafasgo1bf.pdfIn PDF document text
    • http://vomamafawib.scienceontheweb.net/64093938435.pdfIn PDF document text
    • http://rikuximuvo.iblogger.org/what_is_newtons_first_law_of_motion_known_as.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/6d3d900b-0e3b-406b-8544-a314feefbe8d/jujagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d46826d-472b-4edf-9ddd-993bea1f877b/13906517982.pdfIn PDF document text
    • http://pulepuvasa.rf.gd/harry_potter_und_der_stein_der_weisen_ganzer_film_deutsch.pdfIn PDF document text
    • http://bixejefasi.epizy.com/zubilepowowuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/android_checkbox_custom_image_size.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/animal_animation_pictures_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/nz_tenancy_bond_refund_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965e478c-7234-4822-868c-6d00b7a5867a/datufovemekuzunijila.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/60437121593.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/82869735836.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE146 5060 bytes
SHA-256: fa40fe5d32d8f7a36ec713d0d9a6c169b8903810faa4b1a1c30eeb69d4f55820
font_01_sfnt_off0000f29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29A 11140 bytes
SHA-256: 0cbe7c28c9a3bc9a8c58c078d1a97a47e21a648a162d9ace84eb83a448e5c6b8

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