Malicious PDF — malware analysis report

Static analysis result for SHA-256 046cd2e2266f265d…

MALICIOUS

PDF

70.6 KB Created: 2020-12-09 14:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bee02bf39c7c952423b235c2b2721105 SHA-1: dd331522805a18579aec9c9e32518aef031be779 SHA-256: 046cd2e2266f265d08955464221aaa303c4e293896f0382cfe9ee0fe4b4abec6
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to distribute further malware. The document body is heavily obfuscated and unreadable, but the presence of numerous external links points to a link farm or redirection attack.

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://traffmen.ru/strik?utm_term=london+dispersion+forces In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_5f8f2d22bf3d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419412/normal_5fb304f752c67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475588/normal_5fbd50379ccdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365635/normal_5fc9ea8ca9813.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/7372175.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/4094919.pdfIn PDF document text
    • https://sebonegipuwi.weebly.com/uploads/1/3/4/1/134108682/5325837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383334/normal_5f8dc327ca406.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://static1.squarespace.com/static/5fc0c6a4a87939686407af5f/t/5fc154353570fb44d13437a3/1606505526957/74303395534.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38024e2fce462bc9c67ee/t/5fccfc1bd336b863f0c4ddca/1607269411899/wobolegabukebase.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a7ea16f6d44b07c4161b/t/5fcfad5dcd9a2056ff81a04f/1607445854205/petrolia_high_school_football_schedule.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f385f9866f3fd2d4a131/t/5fcc3dad74a40730fb8c86e8/1607220654136/napavelodekofulibofub.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d763c6ccf69f354d82e/1606372726621/mojebegirupadideteveve.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54ceba13a450bab11859f/t/5fca520c44154a71e2c7b9e4/1607094801048/joremobogizenalabobopitu.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_off0000c98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98E 4556 bytes
SHA-256: ec90606b3687c2481be66012df2afdfb1cc60d3ca02c4ffebe1aac61be1c4da1
font_01_sfnt_off0000d90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90D 11744 bytes
SHA-256: c9e2a0f8ed6eca6527908010fc01f55396fec18a51379472d86cd6c7c62eaf15
font_02_sfnt_off0000ffc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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