Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff22a5a4aac3b94d…

MALICIOUS

PDF

66.8 KB Created: 2021-04-01 17:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86ae9cb3287d5314d1864863d480bb8b SHA-1: 487fd5b4c8cae9162a46d963e0ca4daadc83b937 SHA-256: ff22a5a4aac3b94dc50081afd45769b81367ba34f89a57517afebe16ad9e7a25
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used to redirect users to malicious websites for phishing or to download further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to obscure the true destination or to generate traffic. ClamAV detection and ML classification further support its malicious nature. No scripts were extracted, but the presence of external links is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7876

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://jumiwimov.ru/award?keyword=chaplet+of+the+holy+spirit+pdf
    • http://hr-insider.com/dotevixofet76fr.pdf
    • https://cdn-cms.f-static.net/uploads/4418575/normal_5fe90f6b7fab1.pdf
    • https://cdn-cms.f-static.net/uploads/4421341/normal_5fd177652b26c.pdf
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/5450099.pdf
    • http://indital.space/49694564165g851l.pdf
    • https://vepenisa.weebly.com/uploads/1/3/4/3/134339982/vijitip.pdf
    • https://cdn-cms.f-static.net/uploads/4470387/normal_602a84059ed18.pdf
    • http://wulixiv.sportsontheweb.net/gorubutukaju.pdf
    • http://blacklaser.ru/1029037488jxajm.pdf
    • https://subogepaweb.weebly.com/uploads/1/3/2/3/132302814/nudasowop.pdf
    • https://cdn-cms.f-static.net/uploads/4480585/normal_602c03dec825b.pdf
    • http://sethel.xyz/why_is_my_pc_making_a_whirring_noiseoc5px.pdf
    • http://tryadasert.online/optiplex_7010_motherboard_typenuxa4.pdf
    • http://indital.fun/lg_smart_diagnosis_app_microwavelsa3g.pdf
    • http://tamakedesununod.mywebcommunity.org/sediaan_apusan_darah.pdf
    • https://cdn-cms.f-static.net/uploads/4384152/normal_6051af7cb19ae.pdf
    • http://zoneeuro.pro/ryobi_10_portable_table_saw_accessories3f7xp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://widusop.atwebpages.com/23823653061.pdf
    • http://sofibimibojas.myartsonline.com/what_jobs_bachelors_degree_in_psychology.pdf
    • http://nabafutig.myartsonline.com/65117490325.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd2e.bin
e10428ea4bb5cab6da40eb9a072b0d57b9624743a67b8618153d921e1891be8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2E 5136 bytes

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