Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d47125a92232e7…

MALICIOUS

PDF

94.2 KB Created: 2021-03-02 18:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: aec662d49f7de015ab88a0ff146144ab SHA-1: f2d548918875a19b90e77aa6b050f7fc240ee7e6 SHA-256: a1d47125a92232e7314295057d72223d39c57369dd6401271a2a8403b9e0dda0
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, one of which, 'https://maypoin.ru/wix?keyword=free+minecraft+gift+codes+generator', is associated with a phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a malicious intent to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=free+minecraft+gift+codes+generator PDF link annotation
    • https://nokatumevizo.weebly.com/uploads/1/3/2/7/132740479/7212517.pdfIn PDF document text
    • https://kevanosum.weebly.com/uploads/1/3/0/9/130968994/9651497.pdfIn PDF document text
    • https://lepoboniw.weebly.com/uploads/1/3/0/9/130969744/8c5f3ee3e.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/gjghjPt/drive_safe_and_save_pros_and_cons.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/Ulih7sO/magic_touch_wizard_for_hire.pdfIn PDF document text
    • https://vugovarekuluf.weebly.com/uploads/1/3/1/6/131607096/dofutunimebono.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vebusatoro.atwebpages.com/nazixezaxezilusesukiweb.pdfIn PDF document text
    • http://vuwejamadadodi.epizy.com/71245263534.pdfIn PDF document text
    • http://pivirujifija.epizy.com/58906629103.pdfIn PDF document text
    • http://todizegi.epizy.com/14476581091.pdfIn PDF document text
    • http://savurokew.epizy.com/9287460106.pdfIn PDF document text
    • http://tosefiwaniw.rf.gd/febanegonizut.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_off000128d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D1 5264 bytes
SHA-256: a879af08ed344c49f8d489d6bc8fb20b3773a2abb550ed9ccd2695bdd883192e
font_01_sfnt_off00013aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA8 15776 bytes
SHA-256: 589afb3450a58963a7f070a7f6cfd0b11e77dc54c28424833e1fcf1f1e8e7252

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