Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5d3e07ae765cf3…

MALICIOUS

PDF

106.3 KB Created: 2021-02-15 00:01:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c42d6bb07306d689a7bc34e8a44e1080 SHA-1: 3a173d68b85014b77aadee9b1abba7de0fbddc06 SHA-256: 9e5d3e07ae765cf3b928217a3a268e76e077864ee01c4c3734c4b64c15885ab0
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 0.9995

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://druttle.ru/123?utm_term=identidades+trigonometricas+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481170/normal_600feb8958257.pdfIn PDF document text
    • https://jikuvubavul.weebly.com/uploads/1/3/5/9/135964228/7115578.pdfIn PDF document text
    • https://xijexarara.weebly.com/uploads/1/3/4/0/134017378/5384f0a.pdfIn PDF document text
    • https://kotuposa.weebly.com/uploads/1/3/1/4/131406283/juxudasekeweseratajo.pdfIn PDF document text
    • https://tabupuja.weebly.com/uploads/1/3/4/6/134647436/fb86da55308c.pdfIn PDF document text
    • https://fiwobezamarevev.weebly.com/uploads/1/3/2/7/132740324/luputisimidubebal.pdfIn PDF document text
    • http://varnisvakq.ru/big_fish_casino_hack_tool_direct6swrr.pdfIn PDF document text
    • https://gimoxawoja.weebly.com/uploads/1/3/1/3/131380550/ef9175f15f9.pdfIn PDF document text
    • https://pubotaxo.weebly.com/uploads/1/3/5/9/135962756/zirifab_bediduxo.pdfIn PDF document text
    • https://vuverararusug.weebly.com/uploads/1/3/4/8/134883490/3269635.pdfIn PDF document text
    • https://wabebapag.weebly.com/uploads/1/3/4/3/134335427/duvesomirigedib-fezasokatago-lavalodevelaz-tebufokivewiw.pdfIn PDF document text
    • http://nokutanebufevon.iblogger.org/ap_polycet_allotment_order_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417526/normal_5fc7749323033.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://munoxefarofow.rf.gd/pedivap.pdfIn PDF document text
    • http://menutewewunidov.rf.gd/dpcdsb_community_hours_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/tawego.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/pogugumisivide.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/kirin_holdings_co_ltd_annual_report_2017.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001075c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075C 22100 bytes
SHA-256: 1b1e8b9291ece79c4f76276dd523a2c7ff3067205fecc1e2dbd21a646a87a515
font_01_sfnt_off00014755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14755 5380 bytes
SHA-256: 6dcefc2e9e80c87a950f695d764b0d39103dbc82a5eba66b3caf6aa033ed1d35
font_02_sfnt_off0001598d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1598D 13240 bytes
SHA-256: 6007ef5a2fd15043a87457c7b4640871761ee30f3feaccdeecd53c86e223ef73
font_03_sfnt_off000185fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185FB 16204 bytes
SHA-256: 4ac2e3d3ef11da6a850c86b00655bfc004960db5980628061707ddef5c39b24e

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