Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ca5f5d95654432…

MALICIOUS

PDF

69.6 KB Created: 2021-03-07 14:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4bb9c716ad24bde5fe3b6a09e41afabc SHA-1: 74763a75a2da4403051f83f77f89c0ec4bcd1d82 SHA-256: b0ca5f5d95654432aaa769611298d4822cfa8efc0af22e38c70db84efcd14fa3
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 likely phishing-related. It contains numerous embedded URLs, many of which point to disposable domains and are used in a link farm configuration, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/strik?utm_term=fernando+alonso+twitter+c5n PDF link annotation
    • http://kinokaiff.space/43680151149fbjg0.pdfIn PDF document text
    • http://wordwild-store.com/790103741661xxko.pdfIn PDF document text
    • http://rubeatyshop.xyz/mogipurewawidaromigipub05xgy.pdfIn PDF document text
    • http://prosale.company/405945649777306g.pdfIn PDF document text
    • http://homeolimp.com/706598555828ncjh.pdfIn PDF document text
    • http://profapp.pro/wodisejutoja2d3if.pdfIn PDF document text
    • http://mignonette.space/kendo_grid_header_template_checkbox_angularxes21.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/82354590464jgmk2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nonabafat/4661650526.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/jvc_kd-r860bt_wiring_harness_diagram.pdfIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_9e24c6ed21c446e8be02fa0d88ae00e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sinadi/piwotod.pdfIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_c37a3de93baa4a19adfb764d7d8cdf2b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/bloisi_management_organisational_behaviour.pdfIn PDF document text
    • http://pagiwufuvefukuf.epizy.com/cisco_packet_tracer_64_bit_free.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_99e6aeaf6c31461c82943b2c51b0b37d.pdf?index=trueIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_acdce74b91cc4fe1a58db90f14a7fec9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/alcibiades_socrates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb55113e-10f8-4cdc-87fa-ca3c85567633/mamiya_c330_original_price.pdfIn PDF document text
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_f430fa8768e740c48f8378542ee622ec.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7927a4c-645d-49c9-b4e8-eab97dcb03b3/1959330197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e4ad1fb-2ad0-48cb-be7d-41bb0eb21aa6/2599254228.pdfIn PDF document text
    • http://wowonija.epizy.com/where_is_the_learn_button_on_my_marantec_garage_door_opener.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c950e634-d42e-4d05-ab52-dfc10031e158/17393798561.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_off0000d2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FC 5104 bytes
SHA-256: 1790dd52d709f8d0a30834aad08d15ee5cc899ab45056145e276ffa7af544b9e
font_01_sfnt_off0000e47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47E 11020 bytes
SHA-256: 1c70bd5cbb4bb79cd2d8a8b723db8628e75b7eff649f094ae7f76cbfe92eb0fa