Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdcd36415c1b75d7…

MALICIOUS

PDF

72.9 KB Created: 2021-01-07 21:09:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 476b286dbb966031888346ef09436d3c SHA-1: dec7544f5517003d248b8ac4a01557888a98deb3 SHA-256: fdcd36415c1b75d7834ebc6907c3055a14485df3b773dfc1cfc3176899589edb
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/aws?utm_term=amnesia+switch+performance'. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of malicious URLs and the nature of the heuristics suggest a phishing or malware distribution attempt.

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/aws?utm_term=amnesia+switch+performance In PDF document text
    • https://cdn.sqhk.co/vijukifezu/ghpsyif/minujag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454819/normal_5fc396889e623.pdfIn PDF document text
    • https://cdn.sqhk.co/ninubisidire/aOa6hdP/47140735849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5fc2fdb570694.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451945/normal_5fed932558036.pdfIn PDF document text
    • https://cdn.sqhk.co/tiruxugajo/jggphjO/ark_survival_evolved_ps4_gameplay_ita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404745/normal_5faf5f7d31bf7.pdfIn PDF document text
    • https://cdn.sqhk.co/fusulelibev/3xcgfgc/granny_chapter_2_game_download_for_windows_10.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/ff5903c9-c407-431e-81ed-f1cf3396a207/madutul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d374ba-9b1d-4f18-8f9a-0ae4207dc9b9/best_free_weather_apps_for_iphone_x.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/8326499161.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/home_alone_1_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/terraform_azure_vm_availability_set.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_off0000e1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C9 5304 bytes
SHA-256: e2d821132d8adc30b13cc354330ca76c9c1fc27e62715bd11bdab7d05050b886
font_01_sfnt_off0000f3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BF 10304 bytes
SHA-256: 08d5e4b4cc17b759e370358033fa009bd1db79d2d8b66d3e3b9d4aa6f7434297

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