Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f2024db5b80b3e…

MALICIOUS

PDF

102.0 KB Created: 2021-04-01 02:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c85dc0f1c69bb0b1dd91661452885e48 SHA-1: 7a0463d1f536fe4ad303b670cd9fe1d8af73d647 SHA-256: f0f2024db5b80b3eb7409d5bdea2f9457325ed544bcdb767478891216a360670
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the 'ML_NYX_PDF_MALICIOUS' heuristic strongly suggest the document is designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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 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://bologen.ru/123?utm_term=chinatown+malayalam+film+songs PDF link annotation
    • http://diviwisomos.22web.org/motorola_cp200xls_charger.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/gdZkiiH/infected_2013_vietsub.pdfIn PDF document text
    • https://cdn.sqhk.co/bitulore/hjhuuhh/remidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408324/normal_602d0464508de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480414/normal_5ffac3b752c5a.pdfIn PDF document text
    • http://veritebadisifif.iblogger.org/38911982841.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_601a5a9bea6d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475995/normal_60251bf4b0cf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492529/normal_6058f612c3894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416675/normal_603565d2839ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://tuvizida.rf.gd/kodizofiwewozidor.pdfIn PDF document text
    • http://rorewoj.rf.gd/68607203998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb190c5f-7c62-46dd-8cf0-1befa08ce45b/how_to_pair_bluetooth_fh-x700bt.pdfIn PDF document text
    • http://puxabilaxomim.rf.gd/jezepozige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17bfb9dc-0ccc-4509-add1-e431acb4b4e5/where_is_the_ip_address_located_on_a_canon_printer.pdfIn PDF document text
    • http://zalatirutoxof.epizy.com/documento_nacional_abraman_2020.pdfIn PDF document text
    • http://wokoxut.epizy.com/21288888375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63b8cea8-272c-4afb-b0df-ed1319d0baf6/how_to_maintain_weight_with_type_2_diabetes.pdfIn PDF document text
    • http://teredibake.rf.gd/mufup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f836eae-d187-41b9-9946-ab7ce114b6aa/frigidaire_refrigerator_repair_videos.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BA 5184 bytes
SHA-256: e1f0664a222f53fafef1f05bf7c69e549b3356897faec96b6320fdc24e8ba2de
font_01_sfnt_off00013850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13850 6344 bytes
SHA-256: 1b307f8fd2655a25508cb093dfefe0099e2a61ab7f9d203722d831b89a593328
font_02_sfnt_off00014e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E2B 11312 bytes
SHA-256: 047faaf4e3c52bcbb16975ef1a2b48c8149e4a6644eccd1fda6a59affcf9c4ab
font_03_sfnt_off000174f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174F9 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8