Malicious PDF — malware analysis report

Static analysis result for SHA-256 13398208df489de9…

MALICIOUS

PDF

68.0 KB Created: 2020-11-23 09:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b61322a8ede3ad7db0764368edc1a699 SHA-1: 51767cc555682fa092759a0d8c984596d3bd1e0b SHA-256: 13398208df489de9539aba6af73e49713a1a5c03f0ef56704edfb85aea4adf8f
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple external links, including one pointing to 'trafffe.ru/aws?utm_term=cooking+academy+3+rar', suggesting a phishing or malicious download lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/aws?utm_term=cooking+academy+3+rar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450242/normal_5fa864b4e1a13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374002/normal_5f8c93cd0b7c6.pdfIn PDF document text
    • https://bufazojilenove.weebly.com/uploads/1/3/4/6/134639622/moguzuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f8ff617cf5e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f8e6dc2b3b51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f98c4e91f786.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/569dd9b1-1f3e-457c-8fac-975c6f382b29/mupinovadepetixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a220083-5c3c-4359-9ec8-0bac09921dc2/batimumeralujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c9e9bc8-b7c8-4b60-b78e-0c11a5fb78b4/82844938227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca71f68-b22e-439f-acd1-5c682b6a64f0/vamaxubipotoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccdb0bec-9622-4903-ab3b-e3e040f3ca98/56205601288.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_off0000cc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC32 5284 bytes
SHA-256: aef496d85843c6cb07d57c509aaf8f317fc95feab14847148cdb7226d252f95e
font_01_sfnt_off0000de26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE26 11152 bytes
SHA-256: 738619e40e4f84be66e876634bf3cacaf1f222320946df051a040a0c934d7158

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