Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0372b40068806e…

MALICIOUS

PDF

73.5 KB Created: 2021-03-21 06:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e6afe9815e37a65af64bc88fdbacc624 SHA-1: 599e0685816312aa8a0d599d22421e74dc793356 SHA-256: 9f0372b40068806e763d1b2d45fd3cda058dc3bb6a548dc0a7593658d0ed5090
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The primary malicious URL identified is fokemale.ru, which is likely used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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 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://fokemale.ru/strik?utm_term=landing+gear+autocad+drawing PDF link annotation
    • https://duvozogol.weebly.com/uploads/1/3/5/3/135314926/xalipug_sutarerudunob.pdfIn PDF document text
    • http://domavera.ru/reserapironakubujuxa8v22s.pdfIn PDF document text
    • http://nat-fru.space/the_book_of_hygge_the_danish_art_of_living_welldr68v.pdfIn PDF document text
    • https://dalenorilesa.weebly.com/uploads/1/3/4/8/134858788/fusifiditeme.pdfIn PDF document text
    • https://vagibize.weebly.com/uploads/1/3/4/6/134618654/zuwadur_nefutavowi_fulodu_safujevevifimoz.pdfIn PDF document text
    • https://dedidolijara.weebly.com/uploads/1/3/4/6/134666782/mojokuzoduze.pdfIn PDF document text
    • http://podipotekoi.ru/batman_arkham_knight_all_riddlesxijwx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_e5572be3cacd435a88a6d2b18a14fbf8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ba5cdb8-5572-4c91-9f54-3403f70f494a/trabajos_de_escritura_para_segundo_grado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f087064-87e4-4991-b3ba-d4da9ee70661/sharp_aquos_quattron_70_inch_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136d05f2-8bb1-4a5e-a1ce-e191c9eb3725/xesezid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2135b0c-d623-4aa3-b73c-9346bbf991bf/bimago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c13a807-b55d-4411-a8f3-f62b89d6e434/61308627510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02ae0fab-9b77-45d1-a3a5-22a1e674bc5e/59898579886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfbe656f-1a89-4d5e-af48-5d99c6cc7b9a/what_percentage_of_the_population_have_type_1_diabetes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95108c61-cabc-4e55-8dd1-7099e3aaf436/what_is_contract_negotiation_in_agile_manifesto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2701da0-51f6-45d9-b7e0-172e8b7a8d92/tp-link_tl-wa850re_quick_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a616ac72-5410-40c1-a1c9-e6ed4299d9dc/how_to_share_someone_elses_business_page_on_facebook.pdfIn PDF document text
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_8c88ffeec4df47759e6f6f71084a077c.pdf?index=trueIn PDF document text
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_4f82166178c1426fb19f80c8122a2e72.pdf?index=trueIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_bec1988eb6bf45ad95a9545013cd958b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b4a014f-f3b2-4755-8d27-c37a8c8e86cf/17776134933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/384163c9-45fd-4b2c-b1fa-005ea498c1f6/90474991465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d95d31-8880-4c78-baf2-66ed1bcd45d2/mind_power_book_in_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be1ccd17-856d-4862-991a-f5778e1775b9/59122565665.pdfIn PDF document text
    • https://deed868a-3c3f-4b0d-b3ae-f9ebe8a38c33.filesusr.com/ugd/95283b_7d76dccb603c40d08b856615bff1f6c3.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE345 4932 bytes
SHA-256: de5fef580ac86fddd62a6ce478e88136792060b74395e55bf3d61201f7405d62
font_01_sfnt_off0000f430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF430 10696 bytes
SHA-256: 62ea4f9d45686036b2a580d3164eed8bbc62a7fa005c88c229f2929d030d8216