Malicious PDF — malware analysis report

Static analysis result for SHA-256 30966b15aba37bb7…

MALICIOUS

PDF

83.5 KB Created: 2021-04-03 00:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5819adc23d67143c67abd1969ed485f1 SHA-1: 7769ca02dac9cbfb486cf8a23e33a2e1ab76d86e SHA-256: 30966b15aba37bb7684d378d39924576985a57b661a5c7fe2970b9857e2ca86a
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing infrastructure. The PDF structure and embedded URIs are consistent with attempts to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://soxebez.ru/award?keyword=cartoon+drawing+tutorial+for+beginners+pdf PDF link annotation
    • http://zoo-taxi.site/where_are_wayne_dalton_garage_doors_manufacturedwqxjy.pdfIn PDF document text
    • http://normab-id.com/pearson_algebra_1_textbook_table_of_contents5vbrv.pdfIn PDF document text
    • https://cdn.sqhk.co/lelogusobade/K7eigia/tanglewood_elementary_school_lumberton_nc.pdfIn PDF document text
    • https://cdn.sqhk.co/nexasolonit/hfhdjfN/drone_shadow_strike_2_mod_apk_unlimited_money.pdfIn PDF document text
    • http://car-test.pro/biology_practical_book_class_11_gseb23sv4.pdfIn PDF document text
    • http://karnaval.host/gran_turismo_2000ugcri.pdfIn PDF document text
    • http://mx50off.pro/noremekaverozag62utr.pdfIn PDF document text
    • http://hookup157.site/44444275571ejwqb.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/what_happens_if_you_dont_have_a_dot_medical_card.pdfIn PDF document text
    • http://naturebiolog.fun/grand_theft_auto_4_apk_aptoideoetd9.pdfIn PDF document text
    • http://fimewot.xyz/32142648321ulyl.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/jjznhcZ/the_room_movie_2015_trailer.pdfIn PDF document text
    • http://fitatuvepejozo.sportsontheweb.net/87599921245.pdfIn PDF document text
    • http://instapodarok.site/ballpoint_pen_art_for_beginners2td4h.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/75840124282.pdfIn PDF document text
    • http://lofitner.buzz/telamimuvefuwijozumenarbnyby.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_da67035ba15645cd98d2555a96ffb8bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xopugup/80369747464.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/c_p_l_full_form.pdfIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_397ac3924bd24b4180ff7ed039146b7f.pdf?index=trueIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_1275f09db367468284e971ffb6476922.pdf?index=trueIn PDF document text
    • http://fomepufasele.atwebpages.com/baxibitiditufosawefaraxow.pdfIn PDF document text
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_1eb212bb86d246db87784f603e86da92.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/feseni/beaver_builder_nulled.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_off0001092c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092C 5344 bytes
SHA-256: 4b4c6001e71d32a8138777b1de72cebe2751689e1deac43eea63791baf158741
font_01_sfnt_off00011b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B77 10884 bytes
SHA-256: 81aa3602b6a024a28994508e080476ab5880a75c1a853399f551e528487bc18d

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