Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8cb22f22155a54…

MALICIOUS

PDF

78.6 KB Created: 2020-12-28 11:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c74adeb0718e1a96727a78740c283577 SHA-1: 2bf68e03dbe5ab79702721737fa20c4d3a7382dc SHA-256: cf8cb22f22155a546eccf43b9c51f28f63d7e7cd30eb32f364a3fb056d9ba2cc
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 'https://ggtraff.ru/123?utm_term=famowood+glaze+coat+reviews'. This URL is a primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier and ClamAV detection further corroborate the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=famowood+glaze+coat+reviews In PDF document text
    • https://cdn.sqhk.co/ravawiku/CifvAgf/whole_wheat_sandwich_bread_recipe_instant_yeast.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_5fdb066a8791f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_5f90adb9064a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419211/normal_5fcd6178d4d28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402250/normal_5fe2554687b1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387408/normal_5f9a787f6d6cc.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/852a5877-6711-44df-bb42-98bd34ac50be/67485253089.pdfIn PDF document text
    • https://s3.amazonaws.com/giwurode/destroy_the_village_to_save_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f67326-5954-4f04-b68a-6d93747263d5/didajumetemugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531d4342-b96d-40f0-966a-e9ca7678ae51/40463930563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd6d8a86-e688-4b57-9335-96a1fb1d2782/janegatemotol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/233ea444-a2fb-4b8e-a6b5-99b9c9a98413/34741060582.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_off0000f376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF376 5416 bytes
SHA-256: e3c2a410c9d911f133b46fa079c5138aec07f5d3d21ada0266a589fb064aace6
font_01_sfnt_off000105eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 12624 bytes
SHA-256: 3b122432eb463e0739e496a8f6818f5f82b037a00df0c8555ba4324e2e97a6ec

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