Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d0d8e1f7d58191…

MALICIOUS

PDF

80.4 KB Created: 2021-09-13 04:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: cccfeea5470858e7de168cd18e8e61c9 SHA-1: 60c88372451b558219e1178759b01cdf66bab64c SHA-256: 04d0d8e1f7d58191d1f560703bd3c852328feeca1db900873128c3e01ce889c9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm designed to obscure malicious destinations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this behavior, and the ClamAV detection confirms its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://garglob.ru/uplcv?utm_term=the+secret+universal+mind+meditation+pdf PDF link annotation
    • http://superazs.ru/images/news/file/dizavefazukoladiralukog.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021090701183031107.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/lijijefuladudunoxileguk.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/bijilazesininugu.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/fonisowegut.pdfIn PDF document text
    • http://behtarinekhodetbash.com/files/files/delizavine.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/daxuken.pdfIn PDF document text
    • http://hospitalityroyal.com/upload_files/file/kozela.pdfIn PDF document text
    • https://puntodeplacer.com/userfiles/file/87516393341.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/sabajivejuda.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/jimatoveluv.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090417010373499.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/74374859202.pdfIn PDF document text
    • https://fasaac.org/temp/files/39925528768.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/vezuxodesikunavutawe.pdfIn PDF document text
    • https://chungcungoaigiao.vnpec.xyz/uploads/files/35236115332.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/datakadudazesowu.pdfIn PDF document text
    • http://firegallery.ru/img/upload/12095837971.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/dobelitujomu.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/49082948192.pdfIn PDF document text
    • https://hippodrome-compiegne.fr/www/uploads/file/kibepodufitikitezov.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/20454783520.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://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_off0000d517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD517 17672 bytes
SHA-256: 7b88516f1a0378b634342bfc0014abbc511250b83b0a8579df494d737d0e4f52
font_01_sfnt_off0001022e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022E 11016 bytes
SHA-256: fd3a4c3a03c849f1ad8e524c7cb49dea768795b357c5ffd8fcbaa866ea42fafa
font_02_sfnt_off00011b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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