Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ba7a894b5c99f7…

MALICIOUS

PDF

81.0 KB Created: 2021-03-13 16:07:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ca8390bd6e42d54d740ec0f909de6d17 SHA-1: c438dd6e5f5d06ba0614807aba6e54a0746c7cbc SHA-256: e6ba7a894b5c99f7a3d61cf225e3470aaeacbd5b9be5067b3229a0b3f621c2ec
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on potentially untrusted domains, suggesting a campaign to distribute malicious content or phish for information. While no scripts were explicitly extracted, the nature of the embedded URLs and the detection as a 'Pdf.Phishing.Trojan' strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/award?keyword=ancova+in+spss+pdf PDF link annotation
    • https://cdn.sqhk.co/wigalefu/ghhfgf1/unicorn_color_by_number_pixel_art_coloring_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383695/normal_5fedf2641192a.pdfIn PDF document text
    • http://govugododuwo.iblogger.org/how_to_reset_asus_router_rt-n14uhp.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/gopro_hero4_silver_update_download.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/wordly_wise_3000_book_6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494149/normal_602685185f813.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/ujdbFI4/game._classcraft._com_student_sign_in.pdfIn PDF document text
    • https://cdn.sqhk.co/binuwaxe/jaggIhj/wegonewefujadu.pdfIn PDF document text
    • https://sokefumupuzezu.weebly.com/uploads/1/3/5/9/135991751/6577252.pdfIn PDF document text
    • https://xuxedujuwa.weebly.com/uploads/1/3/5/3/135345360/1867162.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443357/normal_5fdeb165b5894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464082/normal_600aea13b45cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417658/normal_6044f53fc0976.pdfIn PDF document text
    • https://xezudabumaku.weebly.com/uploads/1/3/4/3/134377243/bda0c321.pdfIn PDF document text
    • https://cdn.sqhk.co/dipasupor/iqhZijr/planets_in_our_solar_system_for_preschoolers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_601c8943eccf2.pdfIn PDF document text
    • https://cdn.sqhk.co/nazujovo/hg1Esgc/31080972447.pdfIn PDF document text
    • https://tenomexob.weebly.com/uploads/1/3/1/1/131163969/d6c37a9cf4ccc0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laxiruzeremifam.rf.gd/what_are_the_first_5_books_of_the_bible.pdfIn PDF document text
    • http://xapimiwosusuv.epizy.com/wavejoxa.pdfIn PDF document text
    • http://bunedupa.epizy.com/43692046913.pdfIn PDF document text
    • http://kesupipipiret.onlinewebshop.net/cost_driver_english_meaning_in_urdu.pdfIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/pulofodonunurenewenukibag.pdfIn PDF document text
    • http://zuzopejorexa.onlinewebshop.net/romaine_bilingualism.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_off00010011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10011 5068 bytes
SHA-256: 0481cb5be18c95338dc32dbee32eb1864be6a64beccf623c7fdb5be95dab6fc3
font_01_sfnt_off00011172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11172 10992 bytes
SHA-256: 3a2ffdfbe5f7e7fccd9cd980b945a12299e1107be5836a5cbf37a24f1d9ac8c6