Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4e575ed8282ca4…

MALICIOUS

PDF

68.1 KB Created: 2020-11-25 18:24:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4c8779754b5343bde17121eee5a85e98 SHA-1: 08e70416488a587359d5a7d52dc31e5974925b83 SHA-256: 8a4e575ed8282ca4f0b599ddee51467aeb60ff2f52f682cfe7816e8dbc0b38ec
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 detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to 'trafftec.ru', which is likely part of a phishing or credential harvesting scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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://trafftec.ru/strik?utm_term=red+buddha+statue+meaning PDF link annotation
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/4afa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382430/normal_5f8d0d33bc4ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413231/normal_5f9b143fbf7c7.pdfIn PDF document text
    • https://nefositasin.weebly.com/uploads/1/3/4/3/134310380/ruwazipegez.pdfIn PDF document text
    • https://dijanofubor.weebly.com/uploads/1/3/4/6/134605157/9772595.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/ab551706-aa8b-48f8-bd15-317c69e6bc5b/crossfit_nutrition_blocks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd539c90-ebcd-4233-95e9-b481658202f6/17822132005.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/vidmate_app_er_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c67a8a-2e25-454d-af86-8ad063944907/govanugo.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/brown_recluse_spider_pictures_and_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1375a11-9564-4e16-9e6b-ea575f9c55ab/zaman_zaki_taji_qawwal_mp3_free_down.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41034f5b-04a5-41d7-9a90-70d09011a24e/wonapukipadirifalamudafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc15f3d1-a10e-4659-8603-0ba76cb94880/zigefejisovekuragenize.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_off0000cf6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6B 5256 bytes
SHA-256: 9b6a93df34c712d7e1181f28f6373497a62312b18737d7e18d6cd1bded189c6d
font_01_sfnt_off0000e128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE128 10188 bytes
SHA-256: 1c9076498562ea1165f408db57f63342a4eaff81a47ed36af53c2ad7f1577322

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