Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c3a179a6880aa8b…

MALICIOUS

PDF

68.4 KB Created: 2021-03-03 00:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 94b6239c5eb28791f4634c95dd348595 SHA-1: cf58328e06e91caa14a5358ee0135d87640f1339 SHA-256: 2c3a179a6880aa8b970259de0132680f08304ac7629382a5899c00860e89d7f4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, possibly leveraging PDF's scripting capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wix?keyword=south+park+theater+spencer+ia PDF link annotation
    • https://cdn.sqhk.co/susorajin/hbrghie/instagram_logo_vector.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/41298435257.pdfIn PDF document text
    • http://xatakafigudu.getenjoyment.net/what_books_are_the_witcher_series_based_on.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/lord_of_the_flies_book_sparknotes.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/g2IOjia/como_ganar_diamantes_gratis_en_free_fire_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/fK9hhhc/comic_book_animated_movies.pdfIn PDF document text
    • http://delinapod.mypressonline.com/tibizipobebos.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/iDiaSx0/3108000247.pdfIn PDF document text
    • https://cdn.sqhk.co/zitedefew/EgioWdX/metal_slug_3_apk_full_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/ifujfkb/bexutijujemotekipakamafid.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/download_the_bible_for_free.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/the_yearling_1994_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/pigalixow/kXghHjf/8d_music_player_pro_mod_apk.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/pasutiz/62277954005.pdfIn PDF document text
    • http://nibizuladode.onlinewebshop.net/66586946832.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/74381496616.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_off0000cec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC8 5156 bytes
SHA-256: 8c7c07ba73c51730b05b5e2b820df69cefc6ff37f6d38bf9e68c9f2b763cf63a
font_01_sfnt_off0000e048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE048 10504 bytes
SHA-256: 6234f52bc9605a6a6b9ec26baae7f174e41587979b60ea57d9d2f01c80f3b25c

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