Malicious PDF — malware analysis report

Static analysis result for SHA-256 259c5fc12c74a337…

MALICIOUS

PDF

83.2 KB Created: 2021-04-02 08:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 584722a472cbb2467db469f7b38e8af5 SHA-1: 54a522391d62791e3e80c0c8bc52241877e30f1e SHA-256: 259c5fc12c74a3379b2b08802c04947908fb018481d0034385c98b5f9afec656
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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://jumiwimov.ru/award?keyword=ancient+greek+english+dictionary+pdf PDF link annotation
    • http://kobazugipodiv.medianewsonline.com/49282535032.pdfIn PDF document text
    • https://daniveledize.weebly.com/uploads/1/3/4/9/134900130/pidelit.pdfIn PDF document text
    • http://mexawolin.medianewsonline.com/cardiac_disease_book.pdfIn PDF document text
    • http://kolekewoni.mywebcommunity.org/rerijorudasikisi.pdfIn PDF document text
    • https://fabebebu.weebly.com/uploads/1/3/2/7/132740756/rikogaduxenazar.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/5ifn5he/xepot.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/icHjahh/21068275957.pdfIn PDF document text
    • http://kigetipopizatij.getenjoyment.net/biomagnetismo_por_enfermedades.pdfIn PDF document text
    • http://derifupiwa.mypressonline.com/la_certosa_di_parma_stendhal.pdfIn PDF document text
    • https://semovililuf.weebly.com/uploads/1/3/4/4/134476677/mobuvezobovap.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/aghaaji/zegififudikekikopodaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/jgjtk9t/world_s_hardest_word_search_online.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/41WVihj/38393687910.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/1iYidhd/blue_heeler_border_collie_mix_puppies_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/86ifhbd/6939292348.pdfIn PDF document text
    • https://vipuwajaziw.weebly.com/uploads/1/3/5/3/135398090/77f0e53324d9a81.pdfIn PDF document text
    • https://wumaviki.weebly.com/uploads/1/3/0/8/130874148/7775424.pdfIn PDF document text
    • https://cdn.sqhk.co/mifodirula/ejbCRgc/pebodajis.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/wukara/emotional_regulation_worksheets_for_youth.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/glaucoma_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/85368673705.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/vafoduduzodut.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/42081358657.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_off0000f474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF474 5572 bytes
SHA-256: bc2dfe67cc17c7f191cdf072cd5e68a73abc610e315be3e1ae1296162debbe91
font_01_sfnt_off0001077a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077A 17620 bytes
SHA-256: 9b085dbc665e9975a705425feedb4390daf5e148c37ef8e004661533281fd24a

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