Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9c0f9e04cae0b0…

MALICIOUS

PDF

115.6 KB Created: 2021-06-09 05:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3cd1fde68de41a3e69e5ec3682e0e8d0 SHA-1: e2175442a759b682f6823312397f5d1b48d1fd00 SHA-256: 7a9c0f9e04cae0b06f489330d57ae3c0c2426b224580a9fa9306c1f2974de36e
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('soxebez.ru') and acting as a redirector. The PDF's structure suggests it functions as a link farm, likely intended to direct users to malicious websites for phishing or malware delivery. No scripts were extracted, but the presence of external URIs and the link farm heuristic strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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/123?utm_term=brancardier+formation+quebec PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444386/normal_60028c31a680e.pdfIn PDF document text
    • https://kovipokuvukos.weebly.com/uploads/1/3/4/4/134497495/zagusonodumo-tabuxutodo-neboperifijir-kimabebiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445890/normal_605164e5307fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501794/normal_5fcbbe9513cfd.pdfIn PDF document text
    • https://fazofiketir.weebly.com/uploads/1/3/4/5/134507238/nufulej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501660/normal_60385413efa7c.pdfIn PDF document text
    • https://dowisapi.weebly.com/uploads/1/3/4/2/134266119/zujobufoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388613/normal_5ffd7a34908a2.pdfIn PDF document text
    • https://pepevifive.weebly.com/uploads/1/3/4/4/134480859/tepixala-misosadabolujum-pamuv.pdfIn PDF document text
    • https://sajipetifejej.weebly.com/uploads/1/3/4/8/134883768/piwuribobugimobo.pdfIn PDF document text
    • https://nizufamira.weebly.com/uploads/1/3/4/3/134310662/vuxodagowipem_xerixe_nilivivabopikij_gimaz.pdfIn PDF document text
    • https://gisoroweri.weebly.com/uploads/1/3/4/8/134893792/menaxexerefux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://volikedejefa.pbworks.com/w/file/fetch/144654837/english_grammar_checker_reverso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ade0f0d5-7122-41fc-b45a-57391c6203f3/what_to_watch_on_netflix_india_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8b73d4-e828-49d8-9f91-6fd020e077a3/how_to_write_a_good_critical_reflection.pdfIn PDF document text
    • http://jifesepapo.pbworks.com/f/jozodulizapisosivixebot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a1d73a-719d-4b9c-bce7-90164ff3b653/lg_smart_led_tv_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f898150f-94e6-4e64-9b4e-739ca3495440/68972836583.pdfIn PDF document text
    • http://nikekuva.pbworks.com/w/file/fetch/144414246/slayer_leecher_v0_5.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/f/what_is_the_main_idea_of_the_book_tuck_everlasting.pdfIn PDF document text
    • http://mepijewaj.pbworks.com/w/file/fetch/144626814/corafya_10.snf_ders_kitab_meb_cevaplar.pdfIn PDF document text
    • http://gazumadu.pbworks.com/f/bd_chaurasia_thorax.pdfIn PDF document text
    • http://nugewil.pbworks.com/w/file/fetch/144899598/18085263746.pdfIn PDF document text
    • http://masawumel.pbworks.com/f/ditakevibimesazire.pdfIn PDF document text
    • http://vonodatob.pbworks.com/f/hack_deer_hunter_classic.pdfIn PDF document text
    • http://gozuwef.pbworks.com/w/file/fetch/144521031/how_can_i_retrieve_deleted_text_messages_from_my_android_without_a_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb49c8e-ccf3-4658-b8c8-d28c7bea32f6/autumn_air_description.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_off00018307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18307 5272 bytes
SHA-256: 13c9dff1ba1fed55854499391f7d262dfeae36bda6d84c3237d2c852b8750f47
font_01_sfnt_off000194dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194DC 13328 bytes
SHA-256: f42eb88020db38cc2ad708b5d16de5050e62de02de2d9fd4da3c98b764142d24