Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb2324e668fa54c…

MALICIOUS

PDF

72.2 KB Created: 2020-12-20 02:39:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 38136f842fd8e72e75ab8939b252d735 SHA-1: e6d64f7466e26420eeb91b09daeffeb8acdb4ec9 SHA-256: 7bb2324e668fa54c68722e5ea1cb52eea870bf8f9818925806f1694ec48ee2f5
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains an embedded URI pointing to 'trafffe.ru', which is likely part of a phishing or malware distribution scheme. The presence of numerous external links, including a link farm heuristic, suggests an attempt to direct users to potentially harmful content or downloads.

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/strik?utm_term=firestick+apk+codes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5fd7ec55b291a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388067/normal_5fb367d3bc150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413865/normal_5fb741bc72172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_5fd8de702c9de.pdfIn PDF document text
    • https://dajegasizof.weebly.com/uploads/1/3/4/4/134469490/jalazakab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5f9216662c0cf.pdfIn PDF document text
    • https://vugogirofezufus.weebly.com/uploads/1/3/4/3/134355312/duzowipuva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_5f9ae151caee8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf6853485235c868af710/1606284934181/rowegevoroxifewepeges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/257a63c3-927e-4566-9165-c0ea0234778e/fnb_field_events.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe2852173fb5383b6baca9/1606297683065/sulfonation_of_benzene_wikipedia.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90E 5052 bytes
SHA-256: d51a0aca07bbf7264185296f944c14d74f8a8a5fa2c95e36210a0fd890ac7c90
font_01_sfnt_off0000da55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA55 10800 bytes
SHA-256: 0a47e60415a63db35a86110124c08dd37c817e065b0e519220562afe3f9c26b8
font_02_sfnt_off0000ff8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8A 16096 bytes
SHA-256: 61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2

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