Malicious PDF — malware analysis report

Static analysis result for SHA-256 a81b84560b7b16bd…

MALICIOUS

PDF

64.0 KB Created: 2021-01-23 19:28:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4688704762b3164d71256bd338f7e537 SHA-1: 5ce6b9c3579026c4a16053e51d8ca4174121b4dd SHA-256: a81b84560b7b16bd77e5b6843349cfa95153d82f107806156c3146ea8afdf6ad
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing for a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to '1v1 basketball rules' and the authoring application, suggesting a lure. The presence of many external PDF links indicates a link farm, likely for SEO manipulation or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9523

Heuristics 4

  • 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.
  • 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://traffking.ru/123?utm_term=1v1+basketball+rules In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369648/normal_5fcdfb42f25cc.pdfIn PDF document text
    • https://site-1166725.mozfiles.com/files/1166725/crossfit_masters_training_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484641/normal_5ff159f613d34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490244/normal_5fe4f9799f3b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483610/normal_5ff66b345fe92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374189/normal_5ff832edb7f00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472788/normal_5fc7afb8a5e3f.pdfIn PDF document text
    • https://site-1178729.mozfiles.com/files/1178729/impressora_bematech_mp_4200_th_driver.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420459/normal_5febb0876f177.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fef7cc1a7af3.pdfIn PDF document text
    • https://sunowakodi.weebly.com/uploads/1/3/2/8/132814938/2499709.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372721/normal_60074618b1510.pdfIn PDF document text
    • https://cdn.sqhk.co/febenapox/trUicje/los_angeles_county_hair_salon_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/rakapuvad/VVjgqa5/mixanurepirideboguj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486041/normal_5fe9c59759537.pdfIn PDF document text
    • https://mavitebe.weebly.com/uploads/1/3/1/1/131163983/3191316.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382965/normal_5ff2c6648551f.pdfIn PDF document text
    • https://site-1220223.mozfiles.com/files/1220223/47507678521.pdfIn PDF document text
    • https://site-1175480.mozfiles.com/files/1175480/98744414167.pdfIn PDF document text
    • https://megewesaj.weebly.com/uploads/1/3/0/7/130738707/ralivev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405946/normal_5fcace08f3d3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451028/normal_5ff3b95f4c084.pdfIn PDF document text

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