Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceea899ef52e7d42…

MALICIOUS

PDF

68.5 KB Created: 2020-11-25 09:08:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e1988778fe465fd17b82cf6255507524 SHA-1: d152262d7d298686e8d0181096347ff8be63ea44 SHA-256: ceea899ef52e7d42a23affaca98606181001dfd04731e78d75a0e94253b764a3
156 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 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://traffset.ru/123?utm_term=the+viking+spirit+pdf PDF link annotation
    • https://guburumo.weebly.com/uploads/1/3/4/3/134322172/dejigizebeb_gomafuwe_nobetifa_javag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f883f8a14fdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414491/normal_5fa81f70ec535.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/b0972ae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415331/normal_5fb2aef9b489e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f943dd3d064d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409395/normal_5f9ebae2476a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9fc37e-a654-4e71-9454-8e72c789080d/43844701199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72e937a5-c96d-42cf-8a32-66ac12e33dcc/mufum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5abacf3d-13ca-45c5-a840-279bf218db25/zizogidema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a98a86-e085-4863-824c-ed2f07a9833b/filosofia_para_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a7a99c-ff96-4a01-abea-df0d386ebbc4/46357334243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a699edc-9360-40c4-8bf7-2f3b91a9aea0/riwutimiwemolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f60293c5-2bf7-4f10-b948-7058714a11df/eastway_middle_school_charlotte_north_carolina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00088923-d975-4c86-a7b8-1685cae18982/xopiwudofitutejoloda.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_off0000d0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D3 5132 bytes
SHA-256: e9c171272ff58238c05dbe5e00e98626d61ada22715c1948ff95a6663b01dddd
font_01_sfnt_off0000e256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE256 10352 bytes
SHA-256: 134d5c6929e4abd1a8a61fb2378f8c5fd8f33fc01e557dfba4a89d14ccac6cff

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