Malicious PDF — malware analysis report

Static analysis result for SHA-256 591ddbce7b5a4680…

MALICIOUS

PDF

77.5 KB Created: 2021-02-18 15:53:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8a00f54663e5f3a8340760d5f17ddb2d SHA-1: 6fe0c7c6929cd3b4af7876e2d35951f10b0c67e4 SHA-256: 591ddbce7b5a4680e4d6e00fcafa40ca62863b072008dc447ae6328f9daeb379
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://yafferge.ru/wix?keyword=ancient+norse+language+translator In PDF document text
    • https://cdn.sqhk.co/gonolesuzam/4YwglOw/74646710166.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/E4lhcjf/how_to_make_homemade_knife_handle.pdfIn PDF document text
    • https://mabajiluvepe.weebly.com/uploads/1/3/1/4/131409333/dakexuxa-vaxosonasika.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/cjbgijc/ya_books_where_best_friends_fall_in_love.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/hjigdz6/pekiloboboruwiwedupirod.pdfIn PDF document text
    • https://xuvurabog.weebly.com/uploads/1/3/2/6/132696285/vizisoroxirap.pdfIn PDF document text
    • https://naketutetan.weebly.com/uploads/1/3/4/6/134660231/pumixepaza-fepotazowo-dekajo.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/nig3rqT/temple_run_2_lost_jungle_lantern_festival.pdfIn PDF document text
    • https://rofixuninapo.weebly.com/uploads/1/3/5/3/135313709/wizakiranobekituziku.pdfIn PDF document text
    • https://tukobigerokigab.weebly.com/uploads/1/3/4/6/134653943/ziloval.pdfIn PDF document text
    • https://duditoza.weebly.com/uploads/1/3/2/3/132302736/c919fda3381328d.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/fiivjje/arrow_shooting_game_for_free_archery_masteries.pdfIn PDF document text
    • https://noxurawikatiner.weebly.com/uploads/1/3/1/1/131163986/4330082.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392199/normal_5fed5ec623e2a.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/gofilafixu/analisis_del_lazarillo_de_tormes_tratado_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/nukurepowoma.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/video_buddy_app_free_for_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/bibliography_citation_format.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_off0000f2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BF 4956 bytes
SHA-256: baba05c01dfb8cc321d372626a00dd1281ce1a70f6d2e13d4befa7e78080af91
font_01_sfnt_off000103ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AB 10788 bytes
SHA-256: 0e5f1ca7f7606440aef16652e42022e71c99bbdd9faf5a68a305ab223bff5203

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