Malicious PDF — malware analysis report

Static analysis result for SHA-256 28cd9194b1e554b8…

MALICIOUS

PDF

114.2 KB Created: 2021-06-15 13:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a2ce101d848731707e2ec269f89f5173 SHA-1: 1c2d1bef1fa479233eddd67ef2bb856df75766bc SHA-256: 28cd9194b1e554b85023efb62bda9ced6a7510ebe30d77a335db1c851b6c69f0
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 0.9997

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 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://wastran.ru/pbw?utm_term=motu+patlu+cartoon+bangla+video PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413846/normal_5ff0f54a69c71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365636/normal_5ffcaa7da978d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_603029cf01125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422890/normal_604ab3cc09099.pdfIn PDF document text
    • https://rugomekedakore.weebly.com/uploads/1/3/5/3/135302214/bebisij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408355/normal_5fe519e62bae5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372673/normal_5ffa7fd0395b9.pdfIn PDF document text
    • https://rakidovarej.weebly.com/uploads/1/3/4/6/134685608/fufuvetolopino-famozaxuv-wamosagubedube-tikifo.pdfIn PDF document text
    • https://ranepudanaliv.weebly.com/uploads/1/3/4/0/134000181/e10f8192d.pdfIn PDF document text
    • https://mexarufuwusa.weebly.com/uploads/1/3/4/5/134599415/ac5bcef1fb.pdfIn PDF document text
    • https://piwuwati.weebly.com/uploads/1/3/4/4/134404243/nibuvivoxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416299/normal_60069f673d283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419192/normal_5fd62a4f656fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448731/normal_60320503afb69.pdfIn PDF document text
    • https://lemitixodage.weebly.com/uploads/1/3/4/8/134868200/dexurege_paxuporatexuri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_605ff21b81b2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_60608451309cb.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/64f60e4d-4836-4cc0-8a54-ca281185467d/how_do_i_reset_my_wd_my_cloud_admin_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e840e062-039f-4789-90e5-d423bb36334f/35601374437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df89b5e-2b84-4440-8be1-4b824da9d475/how_to_sew_couture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfde4847-6f22-4297-a52e-765e13a765de/pro_106_scanner_charger.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_off000182bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182BB 5268 bytes
SHA-256: c5a609835161f75908dbc51112b74dc7de330d3010c163a8b1885cbbaf5dd753
font_01_sfnt_off000194bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194BF 11408 bytes
SHA-256: feff03db1459f324e26b5c08df2396af36379eba5e220be8b0d590be68ef0b4b

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