Malicious PDF — malware analysis report

Static analysis result for SHA-256 1697998b76621053…

MALICIOUS

PDF

84.2 KB Created: 2021-02-27 20:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7bf928e4620bdb62522a697a05ec8959 SHA-1: 10748c4b59e83bdcd1272e700e64aea033404dd8 SHA-256: 1697998b76621053929c356ef360a73efd79b839edd65db81a982a44e5f145c3
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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.
  • 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://jottigo.ru/wix?keyword=debbie+combs+ray+combs PDF link annotation
    • https://zisovubuzuteb.weebly.com/uploads/1/3/6/0/136086112/zugatezoba.pdfIn PDF document text
    • https://rodagekutav.weebly.com/uploads/1/3/5/3/135313742/8230991.pdfIn PDF document text
    • https://lidafeli.weebly.com/uploads/1/3/4/6/134683499/9315010.pdfIn PDF document text
    • https://muxetomanudone.weebly.com/uploads/1/3/1/4/131406273/6119863.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5ff5719b4a8a5.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/c89fa35fdeebaf.pdfIn PDF document text
    • http://floradoma.net/18456303627khy5y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457838/normal_6022a327331a7.pdfIn PDF document text
    • https://dutebosolet.weebly.com/uploads/1/3/0/9/130969562/likeg.pdfIn PDF document text
    • https://pixufudevolu.weebly.com/uploads/1/3/0/8/130814466/095dfea.pdfIn PDF document text
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/4550169.pdfIn PDF document text
    • https://fewebiporunivag.weebly.com/uploads/1/3/0/7/130775920/2127828.pdfIn PDF document text
    • http://covidcapsule.world/467688940881vwd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459479/normal_5fe0bda5a8ad7.pdfIn PDF document text
    • http://idealicacolumbia.site/diwiwuvooghi9.pdfIn PDF document text
    • https://pimakiwukusa.weebly.com/uploads/1/3/4/7/134712386/fuxejevubonanajud.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/4453189.pdfIn PDF document text
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/gijimip_nogadekumaz_sevonekozojoj_geweri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jozaponi/zefijelifijikep.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_off00010e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E59 5152 bytes
SHA-256: 7e0a719ca27314212dce0d37d0d1434346d0b62b2316238fb8c83b7609cc2dd3
font_01_sfnt_off00011fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD5 10472 bytes
SHA-256: 39a822650564872b2e0ad9e5d8cbec75435220e497252d5d3ef81261ba155a72

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