Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc3b978b946ee08…

MALICIOUS

PDF

71.4 KB Created: 2021-03-28 17:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a1c0adca251309fe577dd2c8c0036fbb SHA-1: 7031fd0c1e607ba5a9ce686d3b621f6300bbf148 SHA-256: 0bc3b978b946ee086c31a5d4194f5e238ff2b30ce883fa03c668e45115679a93
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/123?utm_term=affirmative+negative+and+interrogative+forms+exercises PDF link annotation
    • http://shopbest.online/sony_sa-cs9_specsp376y.pdfIn PDF document text
    • https://gebogunuwol.weebly.com/uploads/1/3/4/7/134732963/4066468.pdfIn PDF document text
    • https://vodefuba.weebly.com/uploads/1/3/4/6/134688083/mavelifamamoto.pdfIn PDF document text
    • http://goodxday.xyz/delta_emery_4_in_1_crib_instructions4hog6.pdfIn PDF document text
    • http://riwuvodobopexu.mywebcommunity.org/kitchen_cabinets_design_catalog.pdfIn PDF document text
    • http://erogan24.website/41195375525i9ll2.pdfIn PDF document text
    • http://tixanijematewe.mypressonline.com/83601132970.pdfIn PDF document text
    • http://vexoxem.scienceontheweb.net/adobe_after_effects_cc_classroom_in_a_book_2020.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/c7a3d13b-6ff4-4e78-b880-a9e0ea4b8adb/57951855832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89700eb-b2ee-4a89-b5ca-e7db5efdf1cd/the_eyes_of_the_dragon.pdfIn PDF document text
    • http://mawidinivetobi.myartsonline.com/antiarrhythmic_drugs_medicinal_chemistry.pdfIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_724799eb9af844bd9cac2ad8265a8253.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c409d69-f616-417b-9f65-e157477b94af/how_do_you_fix_a_minor_sewing_machine_fault.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09a8de0-e66a-4594-8c0e-48b368a5bc61/talezaraduguti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eca2c045-43c9-4dbb-a128-2b30fdf36c88/68027682240.pdfIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_43904f73847744db9957c27296606dc7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/008f325d-4bdf-4e23-83b8-6cd9d5a5ac29/android_application_development_for_dummies_2019.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_off0000d439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD439 5428 bytes
SHA-256: 0c3583ea45221dd1653d0071d4f4047740e73325821c01ed860f643805c1c6ba
font_01_sfnt_off0000e6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A3 12032 bytes
SHA-256: 0a866731a64a81abc47acc0234947fa31478d99b44db999974e8402d2ed80419

Open this report in the interactive analyzer, or submit your own file for analysis.