Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d076dadd2aaee9…

MALICIOUS

PDF

83.7 KB Created: 2021-03-20 04:32:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 54c62e1954087017b4aefcce264bb711 SHA-1: 0e70a7fc0bfd5f96c8e0722ab5d9365ef5af568f SHA-256: 23d076dadd2aaee9c25b18fcb65f8626af4a80d9756162ec1953c9c1e657cbae
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 0.9997

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://crophysi.ru/123?utm_term=fireworks+animation+video+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385862/normal_5ff338452ee12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462038/normal_5fd34e13e545f.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/vapuzipinifem.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/vupir.pdfIn PDF document text
    • http://kepupefidi.iblogger.org/71762313448.pdfIn PDF document text
    • https://vurutosefitipa.weebly.com/uploads/1/3/4/4/134479444/pexobimikaranofi.pdfIn PDF document text
    • http://venolilixe.mygamesonline.org/does_the_arc_trainer_help_lose_weight.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388841/normal_5ff42db64fcd9.pdfIn PDF document text
    • https://kilewesiviteki.weebly.com/uploads/1/3/1/1/131163613/5961103.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/44d68f4d-3afb-454c-b87e-5bf62915ac42/17855636756.pdfIn PDF document text
    • http://fukuselumetu.myartsonline.com/judememudusaxixuvavor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e9ba03-2d77-4efa-9941-4a22ba1c7b9f/what_is_the_cost_of_a_pulse_oximeter.pdfIn PDF document text
    • http://xamupufe.epizy.com/36975088024.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/59238124487.pdfIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_fba36c7d85724981ba4f6e3d7f642e04.pdf?index=trueIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_7d2dfcad34304e70ae8e3ea1ed298315.pdf?index=trueIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_2b72cc8c8cad4be190aa8c07c6f7de38.pdf?index=trueIn PDF document text
    • http://gelilofor.rf.gd/xewowaworo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e928608-f773-41eb-9f9d-28cbd5fcab49/nikon_p510_camera_for_sale.pdfIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_76f3e1ec501241e8a0fda7b3954e6d10.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF992 5192 bytes
SHA-256: fbffe72431839056b6bfda87530212e68b1f371cf2dda79da6ce17520cdec77e
font_01_sfnt_off00010b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3D 4032 bytes
SHA-256: a9ec2f2a285effe5ec803431cf084a713fb28a5f486133590069c344b8228c59
font_02_sfnt_off00011aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACA 11456 bytes
SHA-256: ea4ce2a6460788044aef8a26c8765079a1485d33ece9e3aef2dcf1e2134d78d7

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