Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9fc6cfc501b5186…

MALICIOUS

PDF

74.6 KB Created: 2020-12-30 18:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ace8033b6cead698109f5b2a43395d35 SHA-1: 7e616338c583178393f8c3273daa9fd055447a30 SHA-256: b9fc6cfc501b518662f2ecd0d1306cfec7252360196b9483c08a6af39a061bc7
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least two identified as malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, contains references to arcade rooms and application metadata, suggesting a lure to potentially malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/strik?utm_term=arcade+rooms+open+near+me In PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/1289421.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/YAzsGgf/vikuwewopimubaxexabed.pdfIn PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/914209.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/2d658bc19458.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/dghjzV9/sakuwu.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/631924d2-9bcf-4d8c-91fc-375a9b948caf/punnett_square_practice_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/pirate_video_copilot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd6f5aaa-2217-4baf-91e9-78665bcd6dc3/fixejaduwupajenesexeseguf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ae9186-91f4-48ff-a131-76b6e83047e7/drawing_master_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cad3921-9189-4716-ba1f-b0fa87b1a24b/icarus_at_the_edge_of_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da824bf5-81c4-4d23-9cab-4cd82a128061/70317920829.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/leloledizo.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_off0000e7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C3 5176 bytes
SHA-256: d2a0e568eaf0b6c2523e82ef08a7841f6fb847a5117aa1877f07cacf20d106e9
font_01_sfnt_off0000f945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF945 10864 bytes
SHA-256: c7db177a69c3e44f7a667fe66f80adc5216ad1e304b224c1708b8f29d8530462

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