Malicious PDF — malware analysis report

Static analysis result for SHA-256 305b9ef7942fec6d…

MALICIOUS

PDF

81.3 KB Created: 2021-04-05 04:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a494acca7c5464152f01a10b4aa0080a SHA-1: b00c9250d5fb428d5422f8129d4463811112f3ea SHA-256: 305b9ef7942fec6d4555a126b0565264866cdb5996d00884b774cb5d7d78110e
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 0.9993

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/strik?utm_term=baby+gate+target PDF link annotation
    • http://blognews.top/vintage_singer_free_arm_sewing_machinevfw5w.pdfIn PDF document text
    • http://vududodudo.22web.org/how_to_adjust_delta_monitor_shower_valve.pdfIn PDF document text
    • http://podcard2020.site/jikoxolalib9ggm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473445/normal_605828918b412.pdfIn PDF document text
    • http://azorocheat5.xyz/gate_2020_form_requirementsd4581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476416/normal_6027c3893cc1e.pdfIn PDF document text
    • https://kesolijizik.weebly.com/uploads/1/3/4/2/134265964/7908951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452152/normal_600c04776b5cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412380/normal_6003c083416ae.pdfIn PDF document text
    • https://fugejifok.weebly.com/uploads/1/3/4/1/134132056/274935.pdfIn PDF document text
    • https://sonoxezepokamev.weebly.com/uploads/1/3/3/9/133999938/403608bd4af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403804/normal_5ff9817a152b5.pdfIn PDF document text
    • http://naturfresh.fun/84378034572jvi08.pdfIn PDF document text
    • https://fesitafixob.weebly.com/uploads/1/3/4/6/134653549/187013.pdfIn PDF document text
    • http://resimpub.com/kenmore_freezer_door_shelfpi8pe.pdfIn PDF document text
    • https://pudonaneguk.weebly.com/uploads/1/3/4/7/134767047/5772118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_603f30071ba4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381735/normal_5ff0d83ad7f71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403685/normal_5fc9bf11cccbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_605000627e710.pdfIn PDF document text
    • https://vopoxeja.weebly.com/uploads/1/3/5/3/135346001/8673979.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joxamemi.epizy.com/ab_power_monitor_1000_manual.pdfIn PDF document text
    • http://xamaruver.epizy.com/50695893851.pdfIn PDF document text
    • http://zuvetimimu.rf.gd/rilokefagurepikuromo.pdfIn PDF document text
    • http://joxevabo.epizy.com/jogukudujiwor.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_off0001024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 4932 bytes
SHA-256: 2dd0c32fc7b6c05b9f18b434ab62e93e8dbad07382177d1dbb5043647d409f2e
font_01_sfnt_off0001132e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132E 10504 bytes
SHA-256: db3e3a5e9a8a8c559dee1c225b70af1ffc0ddf3caf738fc75debb16fbeb3bea9

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