Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef2eed9d14b5976…

MALICIOUS

PDF

76.7 KB Created: 2021-02-25 23:12:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4959a0e9557535a34b4c02208ac9091a SHA-1: 52c16d2b6f8627f36f978a965c8abc159fa3aead SHA-256: 6ef2eed9d14b59767c4f445256bad5b87e861a55bf608b13858f07f7335658d8
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, with a critical heuristic identifying it as a PDF link farm. The primary IOC is a URL pointing to a suspicious domain, which is likely used to host malicious content or redirect users. While no scripts were directly extracted, the PDF structure and heuristics suggest an attempt to manipulate search engine results or distribute further malicious content.

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://jacksth.ru/123?utm_term=what+is+the+best+oil+to+deep+fry+french+fries PDF link annotation
    • http://jorowijedo.mywebcommunity.org/dupapubiferemumusipu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490251/normal_5ffc903e68bd3.pdfIn PDF document text
    • https://sumomaduge.weebly.com/uploads/1/3/4/8/134884200/nimimogekaxisumapur.pdfIn PDF document text
    • https://busekedogipu.weebly.com/uploads/1/3/1/4/131454033/34930ec720.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/47941099970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485579/normal_60281e33c58cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417670/normal_5fc793a53dc62.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/dell_latitude_e7450_drivers_download_windows_10_64_bit.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/can_you_remarry_after_divorce_scripture.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409607/normal_5ff26ae09ba58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489245/normal_5fdf3d6460a1e.pdfIn PDF document text
    • https://dubonizu.weebly.com/uploads/1/3/1/6/131606556/xusokolidu-kapubowi.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/20359584952.pdfIn PDF document text
    • https://wozuxepu.weebly.com/uploads/1/3/4/4/134478893/d484db.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/goviwigax/61956874436.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/kapopoze.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/acute_alcohol_intoxication_guidelines.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_off0000eb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB27 5496 bytes
SHA-256: b090ce5cbd8bab1391f1a352cf44c516b5d910d267ff7c55f877c54390b96b5a
font_01_sfnt_off0000fde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE2 11060 bytes
SHA-256: 61729c4698f58feee804fa5a3b863c9f129723529a7db0344c8ab763469043bf

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