Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2236fbbce967bc…

MALICIOUS

PDF

56.6 KB Created: 2020-12-23 13:15:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ac61f4f63fcfaffb95cd7183127b6e99 SHA-1: a20639dde15d126dcc80cbea2dcea9023b16b5a3 SHA-256: 8c2236fbbce967bc6a093d2970b43f13ccbbbd960abe0a34be03af8cb79fd1c1
212 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and appears to contain junk data, suggesting it is not intended for human consumption but rather to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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://traffmen.ru/strik?utm_term=sin+pijama+lyrics+english In PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/8e829.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/popagexexoza/free_movies_online_bootleg.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/arkestra_ka_gana_video.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/jagiremepokibojun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9745e7e5-ee76-4256-bd05-8d72540f54c5/vojekeditoded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa56bb68-1e3b-4021-afb1-b91c65930a25/3049887978.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/vsco_full_mu_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/nirugi.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/55278842401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ecccc46-1fc9-4003-8ab3-dabf657f84d5/rakilarajokivi.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/34912396341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec511d49-9a4d-4d17-8f89-75852d6b2209/duxovonisewor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb5a7e8-2f11-4422-9469-ab24c1801552/plants_vs_zombies_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7c00265-2ca6-4107-8992-6f8c31a5ef5b/good_sites_to_download_free_ebooks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c18d2d57-f4fe-46f2-b634-fcc670b1034c/40770931997.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/diabetes_smart_goals_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/blender_2._8_beginner_tutorial.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC0 5628 bytes
SHA-256: a9979c371e0556dcc5182c63bc68dcc71f2762d61c73d2723eedcb1250331bd1