Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b18694d39832a47…

MALICIOUS

PDF

99.8 KB Created: 2021-03-22 01:09:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 66570b45c25118e966682bca2abdde8d SHA-1: d01d1c2f6e921b3be2ef534d100c96aeac253954 SHA-256: 3b18694d39832a472ae2dd0ce00fde16d1cb6cc7ea67cb01570ea66c1671fef4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant heuristic firing indicating a link farm designed to host many PDF files. One of the primary external URIs points to 'bologen.ru', which is suspicious. While the document body is heavily corrupted, the presence of multiple external links and the 'PDF_SEO_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt. No scripts were extracted, but the overall structure points to a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/award?keyword=politique+d+am%25C3%25A9nagement+du+territoire+en+cote+d+ivoire+pdf PDF link annotation
    • https://xalovediluf.weebly.com/uploads/1/3/1/3/131380345/feboxebi-sufipikuw-vakezifaveles-nibevexo.pdfIn PDF document text
    • https://rakulemiz.weebly.com/uploads/1/3/2/6/132682689/titowobonagupu-jetadugovafexo.pdfIn PDF document text
    • https://vakevugulipew.weebly.com/uploads/1/3/4/5/134507067/dumunenokepekiz_galag.pdfIn PDF document text
    • https://pafutidosuzov.weebly.com/uploads/1/3/5/9/135989867/zaxikizexogifadike.pdfIn PDF document text
    • http://bajoreto.sportsontheweb.net/as_a_man_thinketh_book_pages.pdfIn PDF document text
    • https://nibowivuxewanu.weebly.com/uploads/1/3/1/3/131379040/wegagerixosuk_manisufoxabijus_wumuvi.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/9113586798.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rijemow.onlinewebshop.net/define_cyber_crime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a250912f-4d88-4b11-934f-9cb8a11cdbc2/vakowazogezizujuzasi.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/31389012416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff8d196-414c-416c-b50c-1d00856c77e9/sharepoint_online_administrator_guide.pdfIn PDF document text
    • http://kuvepagigifu.rf.gd/75889873879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b64b8f-60bd-47b9-9be9-a85cfae60f29/jiwoxakemugawakolanexife.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/ordering_decimals_worksheet_for_year_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87f80781-01d4-4aba-bdad-51fb746d3869/klx_110_pit_bike_for_sale_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/tourist_guide_synonym.pdfIn PDF document text
    • http://tezofer.rf.gd/jixalagulukabifuwakizena.pdfIn PDF document text
    • http://jezirateba.rf.gd/73191836672.pdfIn PDF document text
    • http://lemijafuw.epizy.com/82018843985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2d5ff2-c435-45a6-a0bb-14d867f6382f/pogiluguzafanewemoveb.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/kid_friendly_narrative_writing_rubric_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/koxekikemudu.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/banner_background_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/bella_thorne_songs_free.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_off000142ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142CA 5628 bytes
SHA-256: ca1d7416381f025dfdcff4c112143781474fec81b2fcc90651848837ee7ecb1c
font_01_sfnt_off00015597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15597 13132 bytes
SHA-256: 20118560d20fc1bc3760750a1f2b9267b6933cddd6281e58f683d6673665825d