Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a1199904988f6e…

MALICIOUS

PDF

83.3 KB Created: 2021-09-09 15:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 32c8038b99e746313d3771f19f2e784b SHA-1: b6eca628e36e9bf9bbedab8b2c76ccc94da46b8b SHA-256: e9a1199904988f6ec5c4a44ff5be865e37f0dcbc422d50ca90f1612929bcb98a
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable or unknown domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161325b0797b16---disumumazuniporap.pdf In PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/51552984852.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/92024807638.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/67105155963.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/13612560485.pdfIn PDF document text
    • http://cutyoursupport.com/userfiles/file/sekoxaniridexujivow.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/43246097423.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/34999166678.pdfIn PDF document text
    • http://dc-42351dc5a6b3.prshots.es/uploads/userfiles/1630799231/files/nagesudijanavofexox.pdfIn PDF document text
    • http://client.diffuse.info/files/90215729493.pdfIn PDF document text
    • https://digireg.se/upload/40935376086.pdfIn PDF document text
    • https://gkscam.com/userfiles/file/reruzu.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/botoganefivivufubipexig.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-09-04-21-11-55-9uO5dF5S.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/92633564233.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/87049518496.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/jezosu.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/sozudalur.pdfIn PDF document text
    • http://willbramephotography.com/nabopevibajodirukomi.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/posanid.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/veledutaba.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/936875455.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/zijazivav.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/35503671159.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/xusexobeludimisewika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+long+does+boiled+chicken+last+in+the+refrigeratorPDF link annotation
    • 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_off0000e14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14F 16968 bytes
SHA-256: 107d5af957e0362680f59a94720b5f81dfd8de9da59078732017dbece2056e17
font_01_sfnt_off00010d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D07 11064 bytes
SHA-256: 2aea382c47b9155e6f404996f280f273dab7648c9dd3ee83658140b37f0ea8f4
font_02_sfnt_off00012695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12695 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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