Malicious PDF — malware analysis report

Static analysis result for SHA-256 868d5ce2ccaa5959…

MALICIOUS

PDF

87.8 KB Created: 2021-04-30 18:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0b11f40af04c2fa2be64e966a40a0b10 SHA-1: 1e3527f5c504c3dabdfee00f27cab54c09bac284 SHA-256: 868d5ce2ccaa59596ea299be6ef059dff76aee2231b4cef162bfe9d317a9095f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9958

Heuristics 5

  • 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 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://resalured.ru/strik?utm_term=anime+drawing+software+for+pc+free PDF link annotation
    • http://vipobora.iblogger.org/silufij.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/fovutedo.pdfIn PDF document text
    • http://zogeditel.iblogger.org/26771078306.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/wiraduxasetufijonileb.pdfIn PDF document text
    • http://tisiner.iblogger.org/zuwizopapowitofunafigov.pdfIn PDF document text
    • http://gudokav.sportsontheweb.net/nudetelixenugetofepexo.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/Snhhamb/bellator_mma_schedule_channel.pdfIn PDF document text
    • http://xilibinebosapeg.mywebcommunity.org/mejulibutudamaxewawako.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/dhcolgg/76618326518.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/4640153433.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/ihiiggh/builders_invoice_template_australia.pdfIn PDF document text
    • http://somubuzesixuwun.getenjoyment.net/phrasal_verbs_dictionary_cambridge.pdfIn PDF document text
    • http://vizazovabula.mywebcommunity.org/periodic_table_puzzle.pdfIn PDF document text
    • https://cdn.sqhk.co/jameleber/Wihjejj/amana_washer_manual_ntw4605ew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xudaribewipibe.rf.gd/batman_returns_gba.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_42f24a58a9054298ae329358e36ae1cd.pdf?index=trueIn PDF document text
    • http://wegamaluperetuj.atwebpages.com/55575153921.pdfIn PDF document text
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_a095c787686c4d6fa5295e4ca75a6cc0.pdf?index=trueIn PDF document text
    • http://zetuvidofik.epizy.com/78068460111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beb72dc4-2894-47e2-8df0-9d6b4bf795ea/4372632782.pdfIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_dc8cc27b7b4d470eaff1fc345c4fdae2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6189a62-dbdb-4338-85e9-17d0abd4bcd5/bethesda_skyrim_mods_ps4_list.pdfIn PDF document text
    • https://058da8ce-bb30-4b8c-81eb-8903018cac65.filesusr.com/ugd/ab745b_4bf4251af0d54abea7c9927c17bdb670.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e743a1-1fb0-44d1-9d28-23070384912f/94384949933.pdfIn PDF document text
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_4b3a829665254c96816dd62926815f8e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/434baa72-0496-483d-95b3-083ab9a146fe/78820846674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d925a461-7306-456c-a3e9-8d71a0cf44ea/vejawuke.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_off000119e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E2 5524 bytes
SHA-256: 20afd34f7b99f74b000900137b0bb1c7b6355ca710f2ea46112c91c910c6abaf
font_01_sfnt_off00012cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAE 10948 bytes
SHA-256: 0558fc0cb359464d8431495fcadd1b0ff5d400068d8e68ba113f75dd6da49956