Malicious PDF — malware analysis report

Static analysis result for SHA-256 93232442b4f1500a…

MALICIOUS

PDF

78.9 KB Created: 2021-06-05 16:39:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 196f35889308d5b8db0acd43435d7ab8 SHA-1: ec8d5eef5540e57c67b92b80142743e04d5dcabe SHA-256: 93232442b4f1500a3aecc221e584f109837fc827ec734c009e3da950fa2c7d4f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://drafthe.ru/pbw?utm_term=download+battle+trip+sub+indo+bandung PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5ff75e6ec5fd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403119/normal_60252bbbeabff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492259/normal_6001d007099a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_603b1330442a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366666/normal_5fca4590adee8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483345/normal_605131ae762f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418587/normal_5ff20f44e4865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_604071035ae8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_606d8ecbc3739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411500/normal_6039974e91445.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bovojigu.pbworks.com/w/file/fetch/144423651/muferixabenekux.pdfIn PDF document text
    • http://kibumezi.pbworks.com/f/turunowojigapazabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d5ab8b-a41d-4fd9-9e66-ee232d2bbb5d/how_to_delete_games_on_ps_vita_memory_card.pdfIn PDF document text
    • http://foziwedugumu.pbworks.com/f/year_5_maths_quiz_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/796ec0e4-875f-41e2-be22-2c811f6fcc30/toca_life_rp_ideas.pdfIn PDF document text
    • http://vananizi.pbworks.com/w/file/fetch/144504330/59225109016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d7bc52-0ae8-4a62-a89b-5414349c89d4/how_to_use_ergo_infant_insert_with_pillow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36bbcec5-692e-41d9-8b50-04a56792e102/florida_written_drivers_test_study_guide.pdfIn PDF document text
    • http://mawasuwov.pbworks.com/f/turenetizatev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ca2fb6-6ce4-4eb3-ac84-2b493fb3c182/30096729347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daf36ad1-16c0-4c84-86c3-a114eff09d01/the_merchant_of_venice_movie_online.pdfIn PDF document text
    • http://ganosidil.pbworks.com/w/file/fetch/144635610/34204979894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed0d970-09b6-4637-beda-6c736195ade1/how_do_you_adjust_a_glacier_bay_dual_flush_toilet.pdfIn PDF document text
    • http://litorabi.pbworks.com/w/file/fetch/144516564/church_membership_form_template_word.pdfIn PDF document text
    • http://vadibun.pbworks.com/w/file/fetch/144438072/internet_of_things_a_hands-on_approach_book_download.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/w/file/fetch/144460785/clinical_nutrition_and_dietetics_books.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_off0000f480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF480 5356 bytes
SHA-256: 5347b8c1ca038573e8ae135c3ac15c653663392c121b1445a2d1a20ceba185c2
font_01_sfnt_off000106d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D7 10976 bytes
SHA-256: 0e551d993b2241038972212063d17b86ee756dc31db4ecaee49e0966960e13e5