Malicious PDF — malware analysis report

Static analysis result for SHA-256 82575d065cfe6b26…

MALICIOUS

PDF

82.6 KB Created: 2021-03-12 09:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 19e221baafa7cbc97b7fa47f9da49e29 SHA-1: 5d8b83ebd3c4c7d0ffdbcdd2fd2ac613306de849 SHA-256: 82575d065cfe6b262928b329258d1b337923d1c9332896067ccc343ae8067739
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://jacksth.ru/wix?keyword=straight+razor+sharpening+stone+kit PDF link annotation
    • http://jepewadagamer.scienceontheweb.net/53643544423.pdfIn PDF document text
    • http://lusolakidareve.mywebcommunity.org/best_pellet_stove_inserts_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunudixa/bhjrPFQ/dakivomizuwawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476768/normal_601b477385b06.pdfIn PDF document text
    • http://sigixexizo.sportsontheweb.net/xemenatalubujivu.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/hypoglycemia_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421778/normal_5fd31993a5536.pdfIn PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/4548829.pdfIn PDF document text
    • https://cdn.sqhk.co/duzixulok/cjfgcjh/xetidugesugarov.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/gfnVibQ/phoenix_wright_switch_gamestop.pdfIn PDF document text
    • https://cdn.sqhk.co/sozovoja/Viijhid/77743997697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476768/normal_60205eb7199e6.pdfIn PDF document text
    • http://dibiwarisogix.mygamesonline.org/podosikowuwepifetid.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/gfZgihb/dixanotuvob.pdfIn PDF document text
    • https://mebusogaduvorit.weebly.com/uploads/1/3/0/9/130969439/863f39fc8.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/baixar_creator_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_0cadbf9f849047b99afbd18bf2f0f689.pdf?index=trueIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_f27908449ec546439751ca4338d157b2.pdf?index=trueIn PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_ab08f65c5e554aff87537025aa60e4fe.pdf?index=trueIn PDF document text
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_ad2ac5ac114e4a689f578681b5a38f13.pdf?index=trueIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/blood_bowl_miniatures_scale.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A2 5268 bytes
SHA-256: f208a68e13bba79e08ee43f82ad20f394acf5220df7d3ea7e2f3098d2e89d841
font_01_sfnt_off00011a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A90 10056 bytes
SHA-256: 5b0a6a612b0e7e0b82fdccbc2021767e75a0a2c99fa34b12e595fa90ee92dae6

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