Malicious PDF — malware analysis report

Static analysis result for SHA-256 357cdf3573a882dc…

MALICIOUS

PDF

79.6 KB Created: 2021-06-05 02:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 304d3ee63ebfc7798a2002c43be049c2 SHA-1: 28b2f112c6163265e2b6afcf56d9a88300dd5d8e SHA-256: 357cdf3573a882dc34fd87d098d16743e519e7662176ff062d0cc60acab24f36
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://inwebjor.ru/pbw?utm_term=cat%25C3%25A1logo+price+shoes+urbano+2020+virtual PDF link annotation
    • https://lopadedabebaf.weebly.com/uploads/1/3/4/8/134897987/bd70a831aeaa2e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472484/normal_60bab39da4542.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502698/normal_5ffed5436757a.pdfIn PDF document text
    • https://murozukuzofapu.weebly.com/uploads/1/3/4/7/134716639/3900546.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460266/normal_5fcf9b7755613.pdfIn PDF document text
    • https://pelofaneb.weebly.com/uploads/1/3/4/2/134235527/1ba24bd2f9d042.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389821/normal_5ff995dd4225a.pdfIn PDF document text
    • https://xakabitugaret.weebly.com/uploads/1/3/4/3/134366923/883529.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ee3e171-8e65-4d93-b7a2-d3db3f7dfa6c/christmas_quiz_questions_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/267a47f7-28d0-4477-97c7-2c5170711e43/what_are_good_makeup_brush_sets.pdfIn PDF document text
    • http://mutoteja.pbworks.com/w/file/fetch/144510504/tijasosejoxododan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2db8633-2858-401b-8f32-8ea53ecad24e/ap_research_oral_defense_questions_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/267cc77a-7089-489a-9d94-1f06eebfc044/tilusifi.pdfIn PDF document text
    • http://togusan.pbworks.com/w/file/fetch/144613743/65296529773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35806734-e530-4b88-b616-9d874ccceebe/is_there_a_beautiful_creatures_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f875dde-5161-49b9-880e-34b04032c2df/74075709917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ac29a05-7bc3-4ce4-b269-a72bfc6ea9fb/94543384692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0963b388-af78-4c2c-b5a5-ff67590405c4/71350439898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fac4a40f-8206-4d09-8e82-f461aa23d8eb/seripeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7013d33b-9524-40b3-abc1-82ef3b76f117/31390951102.pdfIn PDF document text
    • http://tagexoba.pbworks.com/w/file/fetch/144632760/fufobejuba.pdfIn PDF document text
    • http://vulazojab.pbworks.com/f/alguien_tiene_que_ceder_pelicula_completa_en_espaol_latino_descargar.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD45 5808 bytes
SHA-256: 47543bf31ff54430af0c06369ba31d6542ec6c888bd1024f2d07c5399a2bf9a8
font_01_sfnt_off0000f074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF074 12284 bytes
SHA-256: 1ccec722444e6f3148116ff3a9cb794e099f4f5cbc52e602825499b2ad823aa1
font_02_sfnt_off000118dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DC 16312 bytes
SHA-256: 4dd54476baea8e95977730749914ee2a5f1a6ccb58adbad06d5dc92bdd54ca55

Open this report in the interactive analyzer, or submit your own file for analysis.