Malicious PDF — malware analysis report

Static analysis result for SHA-256 510e98aee8101295…

MALICIOUS

PDF

67.0 KB Created: 2020-11-14 11:01:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35fb76f1fb9fd6bcae5f7f30a423e67e SHA-1: d6343f49de988d08f81575b7a8cd1ba50f121807 SHA-256: 510e98aee810129564feedfa365aff75228eb07f4752cdc554dbfa081f9ecc5a
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as a malicious redirector and link farm, indicating an attempt to direct users to harmful websites. The ML classifier and ClamAV also strongly indicated maliciousness. The embedded links, such as 'https://ggtraff.ru/123?utm_term=the+calvin+cycle+worksheet', are the primary indicators of this malicious intent, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=the+calvin+cycle+worksheet
    • https://cdn-cms.f-static.net/uploads/4479226/normal_5fa8a686afee3.pdf
    • https://mitixofixomu.weebly.com/uploads/1/3/4/3/134333727/jetuzuzixasetas.pdf
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f8757563e397.pdf
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/roditapusiluluxowef.pdf
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f8a647a127b4.pdf
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5fa4b34e151e6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7da3dcf0-65b7-478f-a438-e6c4b5cacebd/24615877691.pdf
    • https://uploads.strikinglycdn.com/files/1fbf6f72-731a-4294-aaf7-a86ea6386e7a/defufajezefuveso.pdf
    • https://uploads.strikinglycdn.com/files/da0f4647-cb7c-4d71-a5c4-4b5ec8ef73a0/fluent_in_3_months_benny_lewis_f.pdf
    • https://uploads.strikinglycdn.com/files/002027ce-ef63-4d64-a864-05ad8d8d562c/wafiwifegoken.pdf
    • https://uploads.strikinglycdn.com/files/040036ce-ad6c-4303-bbb6-bd1bf2cc65d3/vogududuf.pdf
    • https://uploads.strikinglycdn.com/files/b0ec74a8-e389-4477-820b-e679d6d44d03/mage_guide_classic_wow.pdf
    • https://uploads.strikinglycdn.com/files/4f7b2b03-0168-4f23-aeda-8c36ccacaebe/uf_journalism_study_abroad.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8d7.bin
9bebfffd68ec286b183aff2fe4b63fab8aa7873ae26a6505cef5098c9b292cfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D7 5156 bytes
font_01_sfnt_off0000da72.bin
2e1700ac9121b5c159149390141c693b76bd8adf5cffc6f5425870b4c577f23f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA72 10740 bytes

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