Malicious PDF — malware analysis report

Static analysis result for SHA-256 7604d537773485f8…

MALICIOUS

PDF

90.4 KB Created: 2020-12-22 08:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 24dbb1ed7154a3565d29f03b9e37bae8 SHA-1: 926adbd873ae9cd996092946cb3b8d6808145e29 SHA-256: 7604d537773485f856b1d6d95235df56d578d0ccbe6eab454667207c332c60c4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 a high risk score. It contains an embedded URL pointing to 'trafftec.ru', which is likely used to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit vulnerabilities or lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=outbreak+meaning+in+arabic PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480582/normal_5fcb70b4ac338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_5fa9ab41bd5ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478932/normal_5fc3eb0f6fd49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5f89df059eed1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc2b91160f2895dc1f3a0a6/t/5fd132c2283fb005030afda2/1607545540058/god_of_stickman_3_free_download_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/letter_of_renunciation_template_executor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/628e34f7-8af5-474d-82f3-ec170e045e0b/73501666990.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe138b1ab79ef463b706502/t/5fe1701500a6e529c8080378/1608609814742/php_formatter_for_visual_studio_code.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc578a9ab79f442f2486b8d/t/5fc9116fc433223c9853a96e/1607012724591/celebrity_cruises_captains_club_points.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e60b27a199023ac2776a/t/5fcac6faeaa0f22c9099c3bc/1607124730283/versace_chain_reaction_sneakers_grey.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001163b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1163B 30504 bytes
SHA-256: 77f9ba663526e4bb5d9f8fac685f34ad537132e6c17c64b92e22ca35b6247315
font_00_sfnt_off0000d132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD132 2948 bytes
SHA-256: b4e89ce22b0625147f675ecbe73964faefa1f465906c0fb1976ca67ad93ccb2d
font_01_sfnt_off0000dbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB6 4912 bytes
SHA-256: 8518823a97f9b718413d5646fefedcc7abc58fc1475e9bc1c3df4674176498ff
font_02_sfnt_off0000ec5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5A 13060 bytes
SHA-256: e97fda18899a21bf649ccd7e64b7a372c89953f99031618d6c764344a2310382
font_04_sfnt_off00014caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CAF 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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