Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e2ac6f5768dae0…

MALICIOUS

PDF

74.2 KB Created: 2021-09-16 06:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9298269b11511cf45df7f6a62ea9495f SHA-1: 1cc988091c5c6daa1305e46cad6f0846f2051dcf SHA-256: 10e2ac6f5768dae0e03e6ff5fc49026b9cd1cd528e86ebf6c500acc760588a46
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The PDF structure and embedded links point towards an attempt to redirect the user to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://envigest.cz/upload/file/keladuj.pdf In PDF document text
    • https://funke.be/data/file/76109188463.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/pekefomakogevumitiso.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161428894d9fae---20437829180.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/jirofanofobijebuzal.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/juguwupozewudeza.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202197171123606.pdfIn PDF document text
    • https://astoraccessories.com/uploads/ckfinder/files/xosexivaza.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/65623925834.pdfIn PDF document text
    • https://jensbrode.de/files/file/57622499244.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/nuzinagapijipufuvela.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/60850317263.pdfIn PDF document text
    • http://ativn.com/upload/file/gopetenekokur.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/tupuxaxan.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/23440788365.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/89212832559.pdfIn PDF document text
    • http://yibetter.com/data/files/89760077396.pdfIn PDF document text
    • https://yogaspotny.com/userfiles/file/88237522966.pdfIn PDF document text
    • https://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/loloziwe.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/15006004900.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613dee995be53---mapale.pdfIn PDF document text
    • http://web5gstore.com/Files/files/52959295285.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=think+again+adam+grant+pdf+free+downloadPDF 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_off0000beda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEDA 10916 bytes
SHA-256: 565327583b4b6f902281b1f622a251994c633b63bcd6df2bdb7a5acc2317c738
font_01_sfnt_off0000d7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B7 16808 bytes
SHA-256: 5890172e8c0b07b58b5b72a2fb031e17518bfc462054512f4115ff87c13d0463
font_02_sfnt_off00010343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10343 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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