Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce8780ba4f0ca79…

MALICIOUS

PDF

75.3 KB Created: 2021-01-24 23:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 39e1a9cb5d8e6a1502864dee939362d2 SHA-1: 87f0dbff39e8ea23fd237dfd01fce309e700b815 SHA-256: bce8780ba4f0ca79b26cdfe3fed9214bfaa899f50dcbcf475774773a8e6bea11
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://traffmen.ru/123?utm_term=the+amazing+spider+man+mod+apk+rexdl'. This URL is likely used to redirect the user to a phishing or malware download site. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a high likelihood of malicious intent. No scripts were extracted, but the embedded URL is sufficient evidence for a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffmen.ru/123?utm_term=the+amazing+spider+man+mod+apk+rexdl In PDF document text
    • https://cdn.sqhk.co/naliwanik/ieWhfih/53480987540.pdfIn PDF document text
    • https://cdn.sqhk.co/gotubosif/hjnXx1a/should_i_answer_app_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402262/normal_5fd27bb12e287.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443802/normal_5ff947f26c951.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381988/normal_5ffa7aec648c4.pdfIn PDF document text
    • http://golden-bridge.pro/1210221372tjgb1.pdfIn PDF document text
    • https://cdn.sqhk.co/ligilitojob/Ligehbf/remote_control_drone_camera_flipkart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489259/normal_60081ca27fd8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450426/normal_5ff41a6f44dd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380857/normal_5ff9280a77535.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/kudefem/the_odyssey_graphic_novel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/kifofufi.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/performance_monitor_average._disk_sec_transfer.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/89938200205.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD11 5212 bytes
SHA-256: 8b38fb866946107d2b18a20ef3b3d31cebb663972723ad051185d7e27c8f2458
font_01_sfnt_off0000ee9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 10472 bytes
SHA-256: f1d25bcbb99b2cbf60f126609c71efd20508cd1a722d91efa2b62b70d2360745
font_02_sfnt_off00011235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11235 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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