Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5855967f3cb237…

MALICIOUS

PDF

80.4 KB Created: 2020-11-18 01:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9556942627fd236e7d19ee7abe710c6 SHA-1: 11ec18bdef2f9363c3e87d5332ed2a0e1908832b SHA-256: cb5855967f3cb2372279de316763d3496ab666a7fb552aa2ea120ab2e327dad2
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The ML classifier also returned a high confidence score. The embedded links, such as 'https://ggtraff.ru/aws?utm_term=angular+2+bootstrap+admin+template', are likely intended to lead users to phishing sites or download further malware. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=angular+2+bootstrap+admin+template
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdf
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5fa1b13a80255.pdf
    • https://cdn-cms.f-static.net/uploads/4407747/normal_5f936e86359f0.pdf
    • https://cdn-cms.f-static.net/uploads/4382193/normal_5f9513b425498.pdf
    • https://cdn-cms.f-static.net/uploads/4383922/normal_5f91f7de25b37.pdf
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5f993d485ac74.pdf
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5f87dc25bfeae.pdf
    • https://cdn-cms.f-static.net/uploads/4384470/normal_5f9ba4af21605.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9d1e85c1-bdac-4c48-a51f-726349100db3/41200626852.pdf
    • https://s3.amazonaws.com/sinamozagemoger/bl2_bone_of_the_ancients_code.pdf
    • https://s3.amazonaws.com/fukezavazuj/71128203310.pdf
    • https://s3.amazonaws.com/vifusupegiza/beez_template_joomla_3._0.pdf
    • https://s3.amazonaws.com/wewuxuviwar/simplifying_rational_algebraic_expression.pdf
    • https://uploads.strikinglycdn.com/files/4cba4896-ac82-4f74-a79b-0449ea3f0c19/arizona_wranglers_1984.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/karikebumokafesokasezige.pdf
    • https://s3.amazonaws.com/gogonof/tasulenalazoribinur.pdf
    • https://s3.amazonaws.com/vidadaviwal/eras_protocolo.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • 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_off0000c8f5.bin
a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F5 6440 bytes
font_01_sfnt_off0000d8e9.bin
706c8f9814624f6ab3a8571b95674dd4f4d8067ad155b00d33c0edd85a359360		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E9 5540 bytes
font_02_sfnt_off0000eb9f.bin
1ed31c2b25c82569c6037f6d47686602c9e4f20b3acaef9ed40fc393b2c1f32f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9F 2788 bytes
font_03_sfnt_off0000f779.bin
69a8be79286c8bc798f560ba0864fd9856a719fa3c5873428796529555abfc59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF779 11324 bytes
font_04_sfnt_off00011e77.bin
bcfecb9fde4b74e4a2b692e15caf305b2988a1cfe4c6386614002e38d35feb86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E77 16168 bytes

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