Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c3a4f0afdde7e6…

MALICIOUS

PDF

78.1 KB Created: 2020-12-16 23:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dc2bb7f17c73d2bbdd4db132bf05396 SHA-1: 50283162e13e6666b6690de3ec977ab6ac24bc07 SHA-256: a5c3a4f0afdde7e6db45b3a2778bcaeea36e9ed362c9e2966f8be4961a2cdaa3
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=marc+jacobs+wedding+date'. This URL is likely used to lure victims to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=marc+jacobs+wedding+date
    • https://simogewijak.weebly.com/uploads/1/3/4/6/134642120/furijadisiz_soloz_virudumapuzumo_xamabiv.pdf
    • https://gumelajijepepa.weebly.com/uploads/1/3/4/6/134639918/ragukate.pdf
    • https://nodararikerat.weebly.com/uploads/1/3/4/8/134885074/xevuzefaguta.pdf
    • https://cdn-cms.f-static.net/uploads/4465025/normal_5fb7ed930b0de.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/8b504e9c-9950-4c60-8de7-440a4ad34772/60632413076.pdf
    • https://uploads.strikinglycdn.com/files/5b23b3ee-09c4-4dca-aeef-c366f4172623/sheep_brain_dissection_lab_worksheet.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf9f168bfc5186167a205/1606220280245/metifikijek.pdf
    • https://static1.squarespace.com/static/5fc644b6c6d9645836469867/t/5fc91c8ecb4a9754b02d5a5e/1607015566466/scottish_rally_championship_2020.pdf
    • https://static1.squarespace.com/static/5fc532aedf132613bbd9a2a5/t/5fc6c2176beae454314f954b/1606861335559/xikovowefaregujutoge.pdf
    • https://uploads.strikinglycdn.com/files/2fe7df3c-f43e-4c3c-a05d-e3a39b5782f5/52995053950.pdf
    • https://s3.amazonaws.com/kitakilesa/azure_active_directory_domain_services.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c74d.bin
a91b4ff4d44d8b0b24b4641868577f6d8c2599fe7e8ca027f525c160cefdb7e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC74D 5176 bytes
font_01_sfnt_off0000d8fc.bin
33388497f9a11eaefb74cab8b0cf3ba2ac01a263e503e4df967e70a271985fab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FC 2244 bytes
font_02_sfnt_off0000e334.bin
90d22eddd37268d105b4f0df5d1a571dd705c1a367cd4b0398ca043a15a33289		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE334 11112 bytes
font_03_sfnt_off000108b9.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108B9 16036 bytes
font_04_sfnt_off00011d21.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D21 4324 bytes

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