Malicious PDF — malware analysis report

Static analysis result for SHA-256 52447706e462f8c3…

MALICIOUS

PDF

69.8 KB Created: 2021-03-29 02:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 30dddff57cefb0c5beb371e8c69d5df3 SHA-1: b4b7925eaea2cd3946c1b4ed685cd5dfe5a85b26 SHA-256: 52447706e462f8c39509dbaee6b95d7da7e673d202dc98ecb6e3a72b3992b694
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one suspicious URL pointing to a domain associated with malicious activity. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://ponafet.ru/wix?keyword=henderson+county+schools+jobs PDF link annotation
    • http://lomidal.mygamesonline.org/mogujupu.pdfIn PDF document text
    • http://xivobivivupe.mygamesonline.org/diverter_valve_kit_for_jandy_neverlube_valve_4720_replacement_kit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476751/normal_602042df91ff4.pdfIn PDF document text
    • http://jonotijero.medianewsonline.com/how_to_measure_light_colour_temperature.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453891/normal_605a00dddd89a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471475/normal_604d0e4fd6353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463263/normal_5fd7dc1bb1e3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_4bb6f73ed84f4b5a998162bdf83852c7.pdf?index=trueIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_ea0559f604704a02a8de82e89db82c07.pdf?index=trueIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_1b64636b90104ca5b625c3fe318468fe.pdf?index=trueIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_c325b712e2e34fd29557e10c270b0430.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mukutud/adenitis_mesenterica_en_nios.pdfIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_24c05641992e43ab97366cc382c74a94.pdf?index=trueIn PDF document text
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_b81947fca3b74d71ad323f71613f1849.pdf?index=trueIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_10c87728deda40fd93d5be2bd33ec90d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/98125614483.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/39222252273.pdfIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_99f54a2908994a6587cfd459c3f1f7a0.pdf?index=trueIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_6443d398874f4149a31e03e3952b21b0.pdf?index=trueIn PDF document text
    • http://xazopufegi.onlinewebshop.net/pisirezaredodezopotivaloz.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/hp_pavilion_slimline_s5000_motherboard_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/molezikofewiwoze.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/rifaxenorefajujabalevug.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/jobuze.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_off0000d5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F7 5096 bytes
SHA-256: 1c9622b628f110f0c12ec32707afac7aaaf338ced11521e5e91933813246da17
font_01_sfnt_off0000e74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74C 10208 bytes
SHA-256: f5513503e62cb9eca674a3929874d2057d6c48fd5584446610bd929b35835aa6

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