Malicious PDF — malware analysis report

Static analysis result for SHA-256 84546d2026208bda…

MALICIOUS

PDF

74.9 KB Created: 2021-03-05 01:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dfc33d3bb17e06cea52a9ec3498bd2a4 SHA-1: 3b08f384a65e0b65c33919896fd1a97a2484fca4 SHA-256: 84546d2026208bda45d5ded1d82e4f9e7eabce065d501a03950ba01651f08ad6
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links are indicative of a common phishing or malware delivery pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://golowaki.ru/123?utm_term=lg+error+code+ch+53 PDF link annotation
    • http://naliputa.mywebcommunity.org/16118959089.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/karozelapevepen.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/dgfhj1Z/58512274480.pdfIn PDF document text
    • http://masirudukumope.iblogger.org/zejuj.pdfIn PDF document text
    • http://jurojegame.getenjoyment.net/intermatic_st01c_programming_instructions.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/twilight_saga_eclipse_full_movie_streaming.pdfIn PDF document text
    • http://joritirumag.mypressonline.com/jvc_kd-r960bts_wiring_diagram.pdfIn PDF document text
    • http://lupazul.mywebcommunity.org/furavuvabogepiramot.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/tork_1109a_timer_not_working.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/how_much_does_enterprise_cost_to_rent_a_car.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/VCwijgj/41061608502.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/11942515112.pdfIn PDF document text
    • http://pokuwasu.iblogger.org/fur_elise_sheet_music_violin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tojederetesez.epizy.com/railway_recruitment_2019_online_form.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/cydia_free_ios_12._3._1.pdfIn PDF document text
    • http://wufikemofumop.atwebpages.com/singer_quantum_stylist_9960_embroidery_hoop.pdfIn PDF document text
    • http://wobanunep.myartsonline.com/how_much_does_insurance_cost_for_a_sports_facility.pdfIn PDF document text
    • http://bejitepirisobi.epizy.com/backup_android_app_data_before_factory_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/how_create_a_website_with_wordpress.pdfIn PDF document text
    • http://rivamuboxu.epizy.com/advocare_24_day_cleanse_guide.pdfIn PDF document text
    • http://vekemelegewimo.atwebpages.com/best_21_inch_lawn_mower_blade.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA9 5008 bytes
SHA-256: 92c45a34158276992a35562e85547e8857ee2916b618d65cf6cec3cedc72b4a0
font_01_sfnt_off0000fbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB8 10172 bytes
SHA-256: 4f47e871742c719f5f7ed2ccb225a61c2b92b4caa358c71ef65ffc5b2f263ad4

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