Malicious PDF — malware analysis report

Static analysis result for SHA-256 942a0ce9cef77a92…

MALICIOUS

PDF

95.0 KB Created: 2020-11-19 08:00:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1addc0b8e470587771ea3266b18586a3 SHA-1: 11c4aaa746ca12973f8af292000d0a93eada6547 SHA-256: 942a0ce9cef77a92227e8174c1df3f26c06be06d05e03a00ee73000ca2ead343
104 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI and a visual download button lure. The embedded URL, 'https://traffine.ru/123?utm_term=what+is+the+latest+showbox+apk', suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF format and the nature of the findings point towards a potential client-side exploit or a document designed to trick users into downloading 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
  • 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://traffine.ru/123?utm_term=what+is+the+latest+showbox+apk
    • https://cdn-cms.f-static.net/uploads/4377912/normal_5f9cb44aa8db7.pdf
    • https://cdn-cms.f-static.net/uploads/4388627/normal_5f9a82eee0a92.pdf
    • https://cdn-cms.f-static.net/uploads/4444877/normal_5fb5093a97bcd.pdf
    • https://cdn-cms.f-static.net/uploads/4443357/normal_5fb2d3ba1d963.pdf
    • https://cdn-cms.f-static.net/uploads/4424991/normal_5f9df90024b4d.pdf
    • https://cdn-cms.f-static.net/uploads/4390383/normal_5fa180bf189ef.pdf
    • https://cdn-cms.f-static.net/uploads/4401982/normal_5fab778d71e2a.pdf
    • https://cdn-cms.f-static.net/uploads/4407998/normal_5fb48a06b568c.pdf
    • https://cdn-cms.f-static.net/uploads/4417122/normal_5f97312450924.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/78a3f7ca-0892-42a3-abee-21d6fb810a38/liteblue_gov_postalease.pdf
    • https://s3.amazonaws.com/dogazisuze/best_cordless_phone_with_answering_machine_uk.pdf
    • https://uploads.strikinglycdn.com/files/98c16f26-5cc6-4aa1-af6a-af6124962ceb/45876600191.pdf
    • https://uploads.strikinglycdn.com/files/2635fa28-1e1e-4e5c-b217-b9812a495cdf/827655688.pdf
    • https://uploads.strikinglycdn.com/files/422344e1-621a-4f6e-aae0-af8322545794/gmail.com_mail_inbox_mail.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013594.bin
372b5521e8152f37f6bea9089782541bce26c078505ff9b57f5e6be822415379
pdf-font-stream PDF embedded font (sfnt) at offset 0x13594 5188 bytes
font_01_sfnt_off0001474e.bin
67b533ddfbe3256093ba128bc2a9512612756d347a4a9659dc706d3284f08eab
pdf-font-stream PDF embedded font (sfnt) at offset 0x1474E 11156 bytes