Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54c558954a9e743…

MALICIOUS

PDF

79.4 KB Created: 2021-04-03 17:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 497488ca35b0d831bba7ee29cfb82e58 SHA-1: 424171960b98eef26c22015dbf486a252812b0cf SHA-256: c54c558954a9e74356e50e4fe06735535288dae5a539fda499074348d45c7a51
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the overall structure indicate an attempt to deceive users into visiting these sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://maypoin.ru/123?utm_term=classic+wow+fishing+guide+gold PDF link annotation
    • http://wemuwugisenoro.iblogger.org/200w_power_amplifier_circuit_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/jejekije/hebDSgj/34161205809.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388427/normal_5fcda6b99ff10.pdfIn PDF document text
    • http://dudoguxu.22web.org/jukoxozigeti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464874/normal_6053666b8cf62.pdfIn PDF document text
    • http://degadeg.22web.org/formal_introduction_email_to_client_sample.pdfIn PDF document text
    • http://shoop-fe.ru/capites_do_brasil_a_saga_dos_primeiros_colonizadores1tdrk.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/bjdUyii/63047850969.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/ILhftjh/48038314555.pdfIn PDF document text
    • http://tohld.in/7308523998ylylc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416136/normal_60446f55c5073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475729/normal_60549e28dee0f.pdfIn PDF document text
    • http://metunobe.22web.org/fishman_loudbox_artist_bluetooth_120w.pdfIn PDF document text
    • http://lozelenirulotu.22web.org/evaluation_sheet_for_presentation_skills.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474720/normal_601d34d941acf.pdfIn PDF document text
    • http://cosmicgig.com/niwononekemomepofozax8ajmx.pdfIn PDF document text
    • http://blancop.xyz/33475283260f8q2n.pdfIn PDF document text
    • https://cdn.sqhk.co/pememobuwir/XfWZthe/93870228164.pdfIn PDF document text
    • https://cdn.sqhk.co/didowolikex/cqhjVjh/vikings_axe_iowa_city.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kafuxuf.epizy.com/bsc_2nd_year_math_book_download.pdfIn PDF document text
    • http://gagodat.rf.gd/ramijo.pdfIn PDF document text
    • http://zudagedat.epizy.com/67109516763.pdfIn PDF document text
    • http://muvalinifotu.rf.gd/vascular_malformation_knee_treatment.pdfIn PDF document text
    • http://jejemizon.rf.gd/dalufi.pdfIn PDF document text
    • http://wilediza.epizy.com/building_bye_laws_download.pdfIn PDF document text
    • http://vejobewibibir.epizy.com/20206452918.pdfIn PDF document text
    • http://jebufatibakuv.epizy.com/edit_documents_free_mac.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_off0000fa11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA11 5184 bytes
SHA-256: 4dbf2b603492378e4a9e6edc9d31420d5b1cf82b07c5baa975193da32c3be6ff
font_01_sfnt_off00010bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC4 10568 bytes
SHA-256: 5117cca667c4825b40daa24a1be2fe30b682e548760b5c81e83205e6f992b4a7

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