Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff38d9489c5bf0b…

MALICIOUS

PDF

67.9 KB Created: 2020-12-18 06:09:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4bc35d302420b589905d6ff444499c15 SHA-1: 75c2a97d3612925fdb3a986a45e1fdf9affe36dd SHA-256: 5ff38d9489c5bf0bf5668a8cd6c5a05861fd7369f7aa1e753bc2b2000a394c24
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. The primary malicious URL identified is traffnew.ru.

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
  • 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://traffnew.ru/123?utm_term=105cm+to+inch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5f88fe27de3d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446029/normal_5f9d1eed21b57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380079/normal_5fb359ff0a7d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501208/normal_5fc9528cd774e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5fd8287af1679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5fb871d069f2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f878dd535399.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/735327.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/f354bf74-31ea-4ad5-9be4-2812f48b4226/bride_of_the_century_episode_20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbcf40b-4827-4c4d-8129-399f46c0eb89/80051825788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b466d87d-e498-41e3-98e6-2a6278a2acc0/62692810733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6da27f6-88e4-4a23-b351-b250ab2b4c1f/pugotobomutixizevuripoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16df6f8e-4476-4ac5-a71c-b150e7b63470/miniature_guide_to_critical_thinking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29db302d-2066-4025-a889-42e56127613f/98301623322.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc565e860f2895dc105f20e/t/5fd68ef796ed101a3e47b64a/1607896824379/canva_premium_apk_onhax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/267db58d-6a3d-4664-928d-2eff460fb5f7/wazovezo.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_off0000d058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD058 4744 bytes
SHA-256: 4d7d551c8780a493cd44d5c6f71a7d40a11bedd59f14f967a5f7abb445ee265c
font_01_sfnt_off0000e06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06A 10244 bytes
SHA-256: 3ecbd010ed500206469233431b59e335ae5d7c85d6a83a88dfa9bbe6aa10f584

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