Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6137275cc5dd235…

MALICIOUS

PDF

50.6 KB Created: 2021-01-03 14:10:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e2e4b9343962e7060c7c6baa1a36f77 SHA-1: 3f8742d2809e98e513c72943006907ebc3cdf04f SHA-256: d6137275cc5dd235cd5f152ad63a6ff7a41759021683010ee0a2339b0405aa79
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It functions as a redirector, containing numerous links to external PDF files and a primary link to `https://cctraff.ru/aws?utm_term=the+sparkle+emoji+android`, which is flagged as malicious infrastructure. The document's structure suggests it's an image-based lure designed to trick users into clicking on these links, likely leading to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6878

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 50 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://cctraff.ru/aws?utm_term=the+sparkle+emoji+android
    • https://cdn-cms.f-static.net/uploads/4478683/normal_5fd6d7b91a979.pdf
    • https://static.s123-cdn-static.com/uploads/4481067/normal_5fc4609361c50.pdf
    • https://cdn-cms.f-static.net/uploads/4463306/normal_5fa5353d7a241.pdf
    • https://dakusarifupufa.weebly.com/uploads/1/3/3/9/133997242/toruku_dulanutif_bijeb_kajilejidug.pdf
    • https://lifafogiter.weebly.com/uploads/1/3/4/3/134321186/jujuzivebe-godufenawan-nuxujej-gesumakidonisij.pdf
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/5513190.pdf
    • https://xirugavo.weebly.com/uploads/1/3/4/3/134337246/18a907465.pdf
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/xavigi-mizos-gozovewu.pdf
    • https://cdn-cms.f-static.net/uploads/4393349/normal_5fd18ead74432.pdf
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5fd3ceaf1bf67.pdf
    • https://cdn-cms.f-static.net/uploads/4424349/normal_5fa4acc405769.pdf
    • https://uploads.strikinglycdn.com/files/302720fe-aa5e-45c1-bb95-80ac7cb44fd7/audio_libros_de_ingenieria_industrial.pdf
    • https://uploads.strikinglycdn.com/files/14744449-b64c-44fa-9de2-24df4bab6de0/7764240787.pdf

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