Malicious PDF — malware analysis report

Static analysis result for SHA-256 8289458013852ea9…

MALICIOUS

PDF

91.6 KB Created: 2021-02-28 07:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 94e1278b994f50da4d4dc90e0f57afc0 SHA-1: 60852031d356a5ed8efff1b4e26058f6f4820b99 SHA-256: 8289458013852ea9657e60a64a9de3ea5b46938372740d25472c72d2a1ff267a
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wb?keyword=louise%20hay%20sana%20tu%20cuerpo%20afirmaciones PDF link annotation
    • http://balifruit.com/add_text_on_onlinegufhf.pdfIn PDF document text
    • http://bella24.xyz/first_course_abstract_algebra_7th_editions1iod.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/hegihid/another_word_platformer_2._0.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/is_walmart_having_a_black_friday_sale_tomorrow.pdfIn PDF document text
    • http://epipog.com/likee_login_accountyuer5.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/rataragumiladarogiwegemix.pdfIn PDF document text
    • http://e-devletodeme.net/kejamosulozugafoporiped3dgvz.pdfIn PDF document text
    • http://unityfree.xyz/dinoland_cafe_couponx7g9x.pdfIn PDF document text
    • http://gamedv.design/wamezufozewoxiretetokaor9lt.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/85393591489.pdfIn PDF document text
    • http://bonusiotsbera.online/bifadiwenozu3vv07.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/JHhhcih/tuwujisojaduf.pdfIn PDF document text
    • http://vinnipoh.space/xutojevapozawexobaxopi35dsh.pdfIn PDF document text
    • http://lotto-investclub.com/653255398619qdgf.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/fusopoxipo/lafilonajowidaj.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/9517725891.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/mukiwozewizadezavoxawokox.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_off000127a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A7 5264 bytes
SHA-256: f742a0ebed7a5a0b0fc15a3d7e582d3282e1d0c6898ab70b8619f66d432c01bf
font_01_sfnt_off00013977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13977 11864 bytes
SHA-256: 962518ee2ce055275dedbe4bd04c7b88d252955e42398ff1eed0e70e3be7f2b0

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