Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd337605e07f1154…

MALICIOUS

PDF

76.3 KB Created: 2021-03-14 10:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 54cb64c7ebdbee08f49c1c99f782caa9 SHA-1: 111a9ec97714a8adbe5d8db130f8620f6f55338c SHA-256: dd337605e07f1154473426f96283a6076c680a927e5915d01b96c28f7f55aa21
184 Risk Score

Malware Insights

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

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 0.9739

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/award?keyword=somatic+embryogenesis+in+plant+tissue+culture+pdf PDF link annotation
    • https://cdn.sqhk.co/tilafukefuwe/gGhhEuF/59491174148.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/fGOvRgj/unity_webgl_crazy_pixel_apocalypse_3.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/gbkihic/gt500_super_snake_vs_hellcat.pdfIn PDF document text
    • http://vizionsmc.net/nuridexirirarufido6g589.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/geiiihD/19364498312.pdfIn PDF document text
    • http://funseeds.site/list_of_cohesive_devices_in_englishrgt4d.pdfIn PDF document text
    • https://sigudadu.weebly.com/uploads/1/3/4/5/134513773/1039442.pdfIn PDF document text
    • https://seroselek.weebly.com/uploads/1/3/4/6/134636573/3336493.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/gjigl6c/ultimate_life_simulator_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobuwaxegu/jjcOheJ/super_hero_squad_stark_tower_defense_2.pdfIn PDF document text
    • https://nowigusoludi.weebly.com/uploads/1/3/4/2/134266380/rugexulul.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/etib8ic/surifemu.pdfIn PDF document text
    • https://bexobejunoguwed.weebly.com/uploads/1/3/0/7/130775871/pemijo.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/ic2hdjc/merge_heroes_frontier_casual_rpg_online_mod_apk.pdfIn PDF document text
    • https://refunijuxi.weebly.com/uploads/1/3/4/7/134748157/5517007.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/lanaladu/batepenube.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/122585513.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/how_to_use_kitchenaid_grater_attachment.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/salejiragoburuki.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/can_you_get_nfl_sunday_ticket_on_spectrum.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/skills_gap_analysis_template_xls.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10711 5820 bytes
SHA-256: 72b2e7ac4ded501324aafb674a686c6ad29f15951b44cf78ce403370d9d65b7f

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