Malicious PDF — malware analysis report

Static analysis result for SHA-256 51dec559563638d7…

MALICIOUS

PDF

75.6 KB Created: 2021-01-26 17:07:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e485e512b96c33de4d9587d1058e5cd0 SHA-1: adc8d83e24f071b70072b1cda752143711f9f704 SHA-256: 51dec559563638d79c11d6dd4f666bfeba0a7653ae98d44a2a19dca3632af1b5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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
  • 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://trafffe.ru/aws?utm_term=m+letter+whatsapp+status+video++telugu PDF link annotation
    • http://elerctum.org/jamabika1u0ax.pdfIn PDF document text
    • http://hisgohar.site/65094174060uop33.pdfIn PDF document text
    • http://romeita.space/how_to_make_knife_in_little_alchemy_2gscip.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/ig5izjd/real_tractor_farming_simulator_2018.pdfIn PDF document text
    • http://50offshop.info/superheroes_wallpaper_hd_2k_4k_20194tquc.pdfIn PDF document text
    • http://logoped-samara.ru/civilization_revolution_2_plushm0d6.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/heZlggF/31121375257.pdfIn PDF document text
    • http://anyita.space/nezokumesowojaxapolegb1zrc.pdfIn PDF document text
    • http://world-wild-shop.com/turaxe38h3i.pdfIn PDF document text
    • http://ehaberdevlet.com/visokidatenotuvxmcm9.pdfIn PDF document text
    • http://starkrobotics.org/studio_photography_background_imagesffs0c.pdfIn PDF document text
    • https://cdn.sqhk.co/susojareb/gSIYnSk/gay_chat_and_dating_apps.pdfIn PDF document text
    • http://gatorama.site/fujirovarolaxikexn14a.pdfIn PDF document text
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/572024.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/sojaxub/ableton_live_9_sample_packs.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/atheros_client_installation_program_windows_xp.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE410 5380 bytes
SHA-256: e105a3b9f7cda85e4b5c48809f7a07d667c4250ac1a67a8688a369d0749326dd
font_01_sfnt_off0000f671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF671 4768 bytes
SHA-256: 8b6c1ac7dae2ad51db13ad1668bf2e90a1a5e074c51ce51ab3872050e98a513a
font_02_sfnt_off00010754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10754 7552 bytes
SHA-256: 6a3665dc5019fca26f9439d6e7095ce06f5f8cf7749583c77b196c4c816a855e