Malicious PDF — malware analysis report

Static analysis result for SHA-256 04904a96c03a1233…

MALICIOUS

PDF

95.9 KB Created: 2021-03-14 14:19:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b4ad45280e5816eea44ab762426ce970 SHA-1: bb77677f5418bc5023d07789ef01a0b4d9f5e21b SHA-256: 04904a96c03a12332a468c801f16aedee77d86febf422153ab3b3466d87f40ef
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on a link to 'mezovuduw.ru' which is flagged as suspicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple PDF links, suggesting an attempt to obscure malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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://mezovuduw.ru/award?keyword=abscisic+acid+plant+hormone+pdf PDF link annotation
    • http://form-copyrightservices.com/poulan_chainsaw_chain_18knz75.pdfIn PDF document text
    • https://karimimeri.weebly.com/uploads/1/3/1/1/131164281/3652580.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/strongs_concordance_2111.pdfIn PDF document text
    • http://instasavephoto.com/backpack_literature_5th_edition_freeczssp.pdfIn PDF document text
    • https://gojemafofapuvog.weebly.com/uploads/1/3/2/6/132681271/2b564f82d9b.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/51439944579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_60298f628676f.pdfIn PDF document text
    • https://mudepazenanaj.weebly.com/uploads/1/3/4/7/134765609/c140455441c.pdfIn PDF document text
    • http://unosital.space/47186239181f33el.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/mufutemazisonakipo.pdfIn PDF document text
    • https://gamitodotabezoj.weebly.com/uploads/1/3/1/4/131453651/2c3765e8b0d.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/25278143836q5741.pdfIn PDF document text
    • http://repochka.site/kibebodemutitopajauhn2l.pdfIn PDF document text
    • http://momivegod.22web.org/free_printable_comprehension_worksheets_grade_5.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/94886328925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5fd690a534ca7.pdfIn PDF document text
    • https://xugimitedekilim.weebly.com/uploads/1/3/1/4/131482884/livanosaj.pdfIn PDF document text
    • http://mandarins.space/14533459818pyvbt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bedegexemizi.epizy.com/1572113468.pdfIn PDF document text
    • http://fekobovovexi.epizy.com/3726937772.pdfIn PDF document text
    • http://jegajumofi.rf.gd/goputijipukobeverofadun.pdfIn PDF document text
    • http://zagusax.rf.gd/33862374430.pdfIn PDF document text
    • http://vekabun.myartsonline.com/xolowotonenelesu.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_off000120a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A7 5524 bytes
SHA-256: 3772b84f943fb79af0d177952376db7a588c4b73decec93a4d9d270cb242a95a
font_01_sfnt_off0001333d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333D 11868 bytes
SHA-256: 667fa51a7639515d233d15986db10d9651eec2fe1325ae3c07e656efe6578bdf
font_02_sfnt_off00015bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BED 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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