Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08b50758ffd37dd…

MALICIOUS

PDF

65.3 KB Created: 2020-12-15 08:55:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 235a215a51229935ce8a669c98b7602d SHA-1: 9d8e3a2e7628d8815b6aa1eb1db5c3cd88cc04fa SHA-256: d08b50758ffd37dddedae58b19951434640e2062fe70000f0ea7306c41448b6f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to 'traffine.ru', likely a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=mexican+hat+flower+wiki PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451754/normal_5fb98e7809729.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448124/normal_5fc53ea81e36b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5f8891c2b9db0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409258/normal_5fad3bc08ce8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500674/normal_5fb8ebfcd556d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377936/normal_5fc06a13e2830.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/acd22719-087c-4e09-aa7e-540e84b67178/88291359934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06202753-79f6-487d-868a-6fc12c3405ac/planeacion_didactica_para_preescolar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d64366-712e-49eb-a830-7b818c49f487/asus_vs247h-p_remove_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f46085-a3d8-4b18-a0c2-7ce0332df004/2775796729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60e33bf8-2cd6-4146-b0bb-07bf092235e9/control_alt_delete_mac_remote_desktop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e35a224-6bb7-40d2-8d0c-d147a61b0dac/audiosource_amp_100_schematic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d67d2a44-e821-4a65-afff-87aea2515777/83982038334.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_off0000c50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC50E 5020 bytes
SHA-256: 019d6b6e97305c9e2a1e605729d95238e803b8632593b26dae5c028423ce4c4d
font_01_sfnt_off0000d641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD641 10240 bytes
SHA-256: 73d3b3575122c5f30953942237032934a359d4303abba7705bb5f25e894c2966

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