Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e6d9f7fdc653ec…

MALICIOUS

PDF

72.7 KB Created: 2021-07-08 09:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70efbd68f7477f32c4f8f88cf56aa533 SHA-1: 6be539428d19bc3ab1a343a50c6c9cc260270032 SHA-256: f0e6d9f7fdc653ec530c8099ec3f87212cf4850404b3713f7499b87e0cbfcf63
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous links pointing to compromised websites, likely intended to host malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically a phishing or trojan distribution scheme. The embedded JavaScript is likely responsible for initiating the download or redirection to these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16076346017d7c---xepelumobitaxejulan.pdf
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/magasamuvobuweda.pdf
    • http://zae.me/datafiles/file/zeguniwer.pdf
    • http://stromzeleny.cz/file/zemizejuneweg.pdf
    • https://berettyotv.hu/userfiles/files/25432308356.pdf
    • http://seoulsquare.com/userfiles/file/tasaniforobuxosopegizo.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48c4adc008---30874784515.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c24b14c0d31---pabofidazikudaranutup.pdf
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/lewaforasegesax.pdf
    • http://auchli-appenzeller.ch/userfiles/files/zexajekuvibus.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc29b6e761f---46918173559.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/400e939ba31a070946d1d6f3450a8b08/94726539636.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e54d1eb1f08.pdf
    • http://vigova.com/Images_upload/files/soxizafed.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160833486b1311---pewepe.pdf
    • http://gfhs1978reunion.com/clients/56625/File/16639200500.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160b5493e953b4---simafiwedidikudosupixotim.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a377e949a36---67585325841.pdf
    • http://stacjaregeneracja.pl/userfiles/file/75477252689.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55580acc45---44573104622.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f567b4847---88243121457.pdf
    • http://uticachemical.com/files/upload/files/sukaxodilalefatoxuzijo.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/c9eedada9c1678f3599e512ed6af2e60/polirijezigojuluberif.pdf
    • http://mmdplus.com/userfiles/files/20210707_161148.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+rate+constant+of+first+order+reaction+is+60
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b906.bin
662c55c30e5f74e9cad697757514f8671d4dbab30bfffd4170d11f5268fa860f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB906 16580 bytes
font_01_sfnt_off0000e445.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE445 16792 bytes
font_02_sfnt_off0000fc5c.bin
467277fbc89b5a4f10d6618c1ec8fb73e9c1aefef2dc5276d40f08044d9db7d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5C 10780 bytes