Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe394694c9f49e8…

MALICIOUS

PDF

78.2 KB Created: 2021-03-15 02:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fadfdeaf2935d0ea778975b1791d3c49 SHA-1: ba3652bc45ccf6a9a56e49d7a8d3c038bdbdfd4b SHA-256: bbe394694c9f49e8a879d2badf0dfb2700aefca73e310b9ac3bfadb205a64b2d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were extracted, the embedded URLs are the primary indicators of malicious activity, likely leading to further compromise or information theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=mutoscope+for+sale PDF link annotation
    • http://padojuputiki.iblogger.org/68224119143.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/cost_of_living_index_by_state_2020.pdfIn PDF document text
    • http://medupaj.iblogger.org/gefefivulak.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/kufivatolevonudefefeto.pdfIn PDF document text
    • https://fegenogo.weebly.com/uploads/1/3/5/9/135981842/6a8a7f283.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/pemokagalebulagezopaj.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/89100276033.pdfIn PDF document text
    • https://lofugaliwowutuw.weebly.com/uploads/1/3/5/2/135299309/4626110.pdfIn PDF document text
    • https://linowatudevenur.weebly.com/uploads/1/3/4/5/134599813/7bfe4a0b4ee8.pdfIn PDF document text
    • https://fowinojosusine.weebly.com/uploads/1/3/4/4/134495991/xabijaripazo.pdfIn PDF document text
    • https://cdn.sqhk.co/sezabaxo/Fhhjigh/calendar_schedule_planner_app_for_windows.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/jgphhgd/suvomuzubarirop.pdfIn PDF document text
    • http://dodabefokibejo.22web.org/oxford_bookworms.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/desekusoxi/22439186284.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/gazavefovinanozuxetuwimi.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/17554039585.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/berifixit.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/8838517857.pdfIn PDF document text
    • http://keburebaxoza.rf.gd/58840743764.pdfIn PDF document text
    • http://jibogifimot.epizy.com/zisolawawatajerogaxib.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_off0000f0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DD 5012 bytes
SHA-256: d83014defaa10bab7493ab6571bdfd3efa5f31092c78c2cc5f1f9e72ed32e2b2
font_01_sfnt_off00010207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10207 12288 bytes
SHA-256: afe9af743a249579e52445801381c2ebab30064973654e4ee0d17da05349ece8

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