Malicious PDF — malware analysis report

Static analysis result for SHA-256 4acb34ac9d695c7a…

MALICIOUS

PDF

67.6 KB Created: 2021-03-20 23:03:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b006669651e0a6ddab516985f1e4309 SHA-1: 15887800f320c8fd339677faa824f688390d7362 SHA-256: 4acb34ac9d695c7af181256cce357f07be8f95819c02b01e3eb0279b1e5d96b7
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs point to various PDF documents, some of which may host further malicious content or lead to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

Heuristics 4

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://golowaki.ru/aws?utm_term=construction+lingo+for+dummies
    • https://cdn-cms.f-static.net/uploads/4402721/normal_603312daea160.pdf
    • https://cdn-cms.f-static.net/uploads/4495399/normal_5fdbbe82c9c66.pdf
    • https://cdn.sqhk.co/mugejufunij/5nAmkha/phantom_bomber_b17.pdf
    • https://cdn.sqhk.co/rufebumu/vcwgg8H/disneyland_resort_express_route_map.pdf
    • http://koponegigat.medianewsonline.com/what_are_the_highest_paying_jobs_in_information_technology.pdf
    • https://mafivuvaga.weebly.com/uploads/1/3/5/3/135323118/6afe626.pdf
    • http://xafomona.mypressonline.com/genetics_multiple_choice_questions.pdf
    • https://cdn-cms.f-static.net/uploads/4416139/normal_601b1d531bb4c.pdf
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/e7e9fd01e3efb20.pdf
    • https://cdn.sqhk.co/pevedapev/cji6ngc/hong_kong_minersville_phone_number.pdf
    • http://mazanatur.space/kusadejazhtnku.pdf
    • https://cdn-cms.f-static.net/uploads/4418558/normal_6019b6e9f3cb0.pdf
    • http://reform-st.ru/47933592900413io.pdf
    • https://cdn.sqhk.co/teketerep/9apbx13/84116494916.pdf
    • https://tewafegode.weebly.com/uploads/1/3/5/3/135350941/guwif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fewunadupop/past_continuous_exercises_questions_and_answers.pdf
    • https://s3.amazonaws.com/tibanepoxilibud/basic_algebraic_geometry_2_shafarevich.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc5.bin
a7f3f277c383e632b27bd842331720c9383e8083de3b82b370547b7505356c65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 5036 bytes

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