Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eba985e666af344…

MALICIOUS

PDF

79.3 KB Created: 2021-09-21 12:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: beadbc3b899450c1afc9dee91f536a28 SHA-1: 59765b34aa8cfe5ed1fecafe436447e472d97caa SHA-256: 8eba985e666af344de21d387e28672c54464748c43e661c2ed59b058f7afe776
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous external links, many of which point to disposable hosting and are likely part of a link farm. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document attempts to trick users into revealing sensitive information such as private keys or passwords. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://infrive.ru/uplcv?utm_term=calculator+apk+lock+download PDF link annotation
    • https://fonixkoncert.hu/upload/file/7516941330.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3bb1cc36a---5051311211.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/18934620090.pdfIn PDF document text
    • http://bresky.cz/res/file/4848124219.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/89406988241.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/46531780557.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/xabuw.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161457abb22995---39033727846.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/watexupifuwuwap.pdfIn PDF document text
    • https://jimsdelibrookhaven.com/demo/jimsdeli/admin/userfilesfile/26699680913.pdfIn PDF document text
    • https://go2germany.ru/files/file/72653161410.pdfIn PDF document text
    • https://24emk.ru/ckfinder/userfiles/files/15084720807.pdfIn PDF document text
    • https://soenen-pneus.com/upload/file/36331000002.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210918140924.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/vodewolusufizufexogob.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/84602214165.pdfIn PDF document text
    • http://ekosertifikat.uznature.uz/userfiles/file/wixazupenuwolasofazagutux.pdfIn PDF document text
    • http://bitree.net/ckfinder/userfiles/files/56663114682.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/rurodujufifefo.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/gilidajenilirenaxis.pdfIn PDF document text
    • http://ty6600.com/userfiles/file/72285737021.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/fivusixodudetife.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/32136839610.pdfIn PDF document text
    • https://gjbuyerbroker.com/userfiles/file/53205461871.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_off0000d196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD196 10424 bytes
SHA-256: 5266da0648eb2a113ccd11c0910648a5acce2454a258dbf090942dbebf86093e
font_01_sfnt_off0000e969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE969 18140 bytes
SHA-256: 2a462f8fb7ba53beb42c206e1fed31237a09a129f67182c81daee26e0741552d
font_02_sfnt_off00011809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11809 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1