Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dcbff7c74442383…

MALICIOUS

PDF

83.4 KB Created: 2020-12-18 05:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4b571e487800560849f50810ea4fb148 SHA-1: c9ac468bb8f10f26be6ef7481ee84d00ce07b800 SHA-256: 6dcbff7c74442383a8f4ae34fab4c1c510a2a2351d891ac1c5affbd760e28a51
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI. The embedded URL points to 'traffine.ru', suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external links are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/123?utm_term=citation+practice+worksheet+middle+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401515/normal_5fd77cbd8db83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413967/normal_5faf9b9967a2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f9a4dfc30414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_5fb5bad1454a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390328/normal_5fa9946abda8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5fb25b84476a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414152/normal_5fbc9bebcdc71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489244/normal_5fd26df5008db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449990/normal_5fb037e520b8d.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/2c6d86d5-a72f-4da2-b2c8-771dc45ae43f/1118562720.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/frostwire_plus_app_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/37779468297.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/37943649723.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/amitriptilina_para_migraa.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED19 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000fe00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE00 5376 bytes
SHA-256: 5cc7df0b3261745876f1ac58c9306801a9c47b6d47539e25046e3b8f619af377
font_02_sfnt_off00011020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11020 1932 bytes
SHA-256: c4a0a6091bffb4a9149ab22e855f1e59e8ef2572e2c61c01c3e503ee78cf41f4
font_03_sfnt_off00011965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11965 11504 bytes
SHA-256: 50e4d5cc67d84e622d7098ad9f4714b16d2380365aeb6023e437a0724e8b4ede

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