Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48aa0e68af0c1d8…

MALICIOUS

PDF

74.9 KB Created: 2021-04-02 03:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 31190d5d0e7e71738971044df2871349 SHA-1: 8d5f9856c93d10711026b2e7d9cf32c6947270cf SHA-256: f48aa0e68af0c1d8093bd6975e334a338226135e7b409e00e06d2646b0dae17b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the primary attack pattern involves directing users to potentially malicious external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9688

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/award?keyword=wooden+door+frame+details+pdf PDF link annotation
    • http://center-about.com/finding_slope_between_two_pointscdw6x.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/verbal_analogies_test.pdfIn PDF document text
    • http://ceter.xyz/854710791592gq3n.pdfIn PDF document text
    • https://ronumotesagazuw.weebly.com/uploads/1/3/4/3/134373959/telirigis_tuvexezi_finon.pdfIn PDF document text
    • https://dobivevoxopu.weebly.com/uploads/1/3/1/4/131453544/vikomotopivubij_wovin.pdfIn PDF document text
    • https://mofasabopileb.weebly.com/uploads/1/3/4/1/134109330/kotosovamenisew-ziginezibux-risorezi-gepinab.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/xageduloka_resaduxosedisuk.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxumududu/ajfUgcD/larabejilaxigivip.pdfIn PDF document text
    • https://cdn.sqhk.co/wadebekop/hHib02d/free_religious_stickers_for_whatsapp.pdfIn PDF document text
    • http://graatorama.fun/rafubaseg9716.pdfIn PDF document text
    • https://pegepigav.weebly.com/uploads/1/3/4/4/134481067/jipatilanojufokaw.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/spontaneous_bacterial_peritonitis_guidelines.pdfIn PDF document text
    • https://dinabowufijub.weebly.com/uploads/1/3/4/7/134751612/99c4ed4cf25f10.pdfIn PDF document text
    • https://togolotokafusaf.weebly.com/uploads/1/3/5/2/135294136/fajejomepanog_wagafodawil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kosigasarem.epizy.com/girajewajetosa.pdfIn PDF document text
    • http://xuxirifuv.rf.gd/tozimizabezolatisofip.pdfIn PDF document text
    • http://tizepadeda.rf.gd/arrhythmia_causes.pdfIn PDF document text
    • http://jowosos.myartsonline.com/why_wont_my_passport_work_on_my_mac.pdfIn PDF document text
    • http://pikaderobiw.atwebpages.com/lumotozebo.pdfIn PDF document text
    • http://watijosanowo.epizy.com/cara_membuat_blog_gratis_di_hp_android.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA21 5200 bytes
SHA-256: 442bc7f5909b9ed90bbd33a2e8319f52a52337c73a8f6ef296f8c9e12ebcbf46
font_01_sfnt_off00010bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC5 10232 bytes
SHA-256: 95b45b39390808c3690e019cac4fc58e8f90f2f367d9a1370b5129c91d178903

Open this report in the interactive analyzer, or submit your own file for analysis.