Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ddd1813571fd01…

MALICIOUS

PDF

92.9 KB Created: 2021-03-14 11:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: bddcf326ecd212c4c046cce4aaf08320 SHA-1: 52dc1640d5e260d87668a959bc1d42d8bd77cacd SHA-256: 90ddd1813571fd01048a9490aa489709be0cedf478560745c7fe784e291d861c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, with several pointing to disposable hosting and exhibiting link farm characteristics. The ClamAV detection and ML classifier indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains text related to 'solving equations word problems worksheet pdf', suggesting a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5109

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://nipisod.ru/award?keyword=solving+equations+word+problems+worksheet+pdf PDF link annotation
    • http://gajozemexip.22web.org/viluxekidozif.pdfIn PDF document text
    • http://buputenajonix.mywebcommunity.org/adda247_current_affairs_may_2020.pdfIn PDF document text
    • http://appless.space/pugodxt37v.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/26913465319.pdfIn PDF document text
    • http://lollipopa.online/school_calendar_template_google_sheetsnejxn.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/charles_dickens_a_christmas_carol_first_edition_value.pdfIn PDF document text
    • http://bagesopabiwub.scienceontheweb.net/19060002997.pdfIn PDF document text
    • http://cherrypimp.online/fundamentals_of_engineering_review_manualb9aij.pdfIn PDF document text
    • http://help-nanny.site/acre_of_diamonds_storybt45l.pdfIn PDF document text
    • http://allostar.buzz/515847488658lixz.pdfIn PDF document text
    • http://urolog.xyz/how_does_justice_help_societyuxwzu.pdfIn PDF document text
    • http://jafalule.22web.org/64177135313.pdfIn PDF document text
    • http://auto-fishing-rods1.club/the_true_measure_of_a_man_martin_luther_king7sq01.pdfIn PDF document text
    • http://site-shop.xyz/beach_wallpaper_freet19ft.pdfIn PDF document text
    • http://normal-id.com/shadowing_mr._m_worksheet2u9r6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce3fa27-5423-4ff0-b94d-ad28bb0698a1/pirates_of_the_caribbean_medley_piano_musescore.pdfIn PDF document text
    • http://towidono.rf.gd/jomifibilurotexulajuzobo.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/cap_guidelines_idsa.pdfIn PDF document text
    • http://kalawutef.rf.gd/azar_grammar_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/cd_rom_drivers.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/80123073583.pdfIn PDF document text
    • http://gorumefu.rf.gd/origami_cranes_step_by_step.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/ceramic_cookware_reviews_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/up_b._ed_application_form_2019_fees.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d18ca58f-d3d0-412a-8f98-904a7217d744/how_do_you_oil_a_grandfather_clock.pdfIn PDF document text

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