Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd8af5e791a79503…

MALICIOUS

PDF

58.9 KB Created: 2021-01-19 09:49:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa864f557be2d60696e403efe7f9174c SHA-1: cb115f519096a7e5e093f3e8cd2c4b5ba7cdda11 SHA-256: fd8af5e791a79503628bc45f6e8b2315fe6d62e78c9a96044dd0032653b2e4d8
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of external URIs and a link farm heuristic points to an attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8151

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://jottigo.ru/123?utm_term=st+patrick+mission+church+st+charles+il
    • https://cdn.sqhk.co/ributexovek/ajbighf/free_animated_video_maker_online.pdf
    • https://cdn.sqhk.co/tuledapozato/haia2if/35667577497.pdf
    • https://vovezakiw.weebly.com/uploads/1/3/4/5/134523709/zidari.pdf
    • https://cdn.sqhk.co/tadanopi/geKsjjb/off_road_rover_e1_off-_road.pdf
    • https://bisaderivulele.weebly.com/uploads/1/3/4/7/134744485/vonemufuzumaguxijuna.pdf
    • https://bujopulima.weebly.com/uploads/1/3/3/9/133997272/5776556.pdf
    • https://gubetixe.weebly.com/uploads/1/3/4/3/134314982/5a368b23512.pdf
    • http://muparizuxufuxud.22web.org/capriccio_bubbly_sangria_nutrition_information.pdf
    • http://ralenexixozuk.iblogger.org/butcher_shop_business_plan.pdf
    • http://jixelaxoli.66ghz.com/zonodikiwemixusupelise.pdf
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/3719299.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fikexole.rf.gd/heads_up_coaches_concussion_answers.pdf
    • http://gokamevagared.epizy.com/13726704387.pdf
    • http://nosifunugiwes.epizy.com/fallout_4_mod_list_guide.pdf
    • http://wevevaviz.epizy.com/80052156005.pdf
    • http://mezomiwewelebe.epizy.com/clinkz_dota_2_guide.pdf
    • http://xapimiwosusuv.epizy.com/beauxbatons_uniform_colour.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d131.bin
4a841c085f9bd121a0e326e3f5aeb13e9c57766726a7d9adeedff455ebbc75c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD131 5340 bytes

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