Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4dd655d0e3b854…

MALICIOUS

PDF

76.4 KB Created: 2020-12-29 19:56:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ff32ed64bfc426fe9daceff57e5b524e SHA-1: e7672a03978232bf619eb221b52e4afaa5ee581b SHA-256: 5f4dd655d0e3b854bc87c75b56666e28b35b9f580761d6dde63a0665fa0ec830
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to a URL that appears to be a lure for downloading an APK. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a phishing or malware distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/strik?utm_term=go+multiple+parallel+account+pro+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409630/normal_5fb943e151b4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5fc13d1e18f92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527164/normal_5fbbece5acdb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376380/normal_5fa7083300cfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416653/normal_5faac369ef1d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450034/normal_5fdbe45ea7035.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://s3.amazonaws.com/dowavelaxam/61068350163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d38c7b27-101e-4392-a8c4-a5fcc7a10d09/54542041770.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/canada_visa_form_india.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/casio_lk_100_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/38623345229.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/vowegipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a17937-b5a9-4240-a6d3-8aa38e669365/vowupukovoti.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC201 4880 bytes
SHA-256: 0865a3b9847448fda41ed13ffee017772f23e3c65340efd0d1bcc7ef48df0a45
font_01_sfnt_off0000d276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD276 1796 bytes
SHA-256: dfab3945eace5ba27be1ad95d63d5142397767eab6bca27773794b33bda2302c
font_02_sfnt_off0000db00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB00 11096 bytes
SHA-256: 7b119c6755e33e8a64302341128f26bf93d32c995edc075e792c4f71a345bc92
font_03_sfnt_off00010108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10108 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
font_04_sfnt_off000115d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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