Malicious PDF — malware analysis report

Static analysis result for SHA-256 df29c17f205701d0…

MALICIOUS

PDF

77.7 KB Created: 2021-09-09 20:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 30afc79583fa4924534c713d288f3868 SHA-1: 85953bf7ed0379162bbf643026c7b15dc1bccc39 SHA-256: df29c17f205701d08b9dc243fcb30a59a3ae26be8d3a4cdaeb720d40939aafe6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns are consistent with a phishing lure designed to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://abbeytraining.net/userfiles/file/11682599280.pdf In PDF document text
    • http://www.rpv-drachten.nl/files/file/93691088066.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/32129851895.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/28428296605.pdfIn PDF document text
    • http://na3.it/misc/file/21066877685.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d5d213519---57980317179.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///rupapidutalap.pdfIn PDF document text
    • http://ssp.by/var/upload/41411904698.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/47205933096.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/69945148627.pdfIn PDF document text
    • http://355353.ru/userfiles/file/gunaremosakemewig.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/161382c358f902---guxoxirijokara.pdfIn PDF document text
    • http://thienanglass.vn/upload/files/nobijategezowiwi.pdfIn PDF document text
    • https://resortweeks.pro/userfiles/file/11301669126.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/35004521696.pdfIn PDF document text
    • http://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/31686790411.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/xasofifigokudavot.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/38366067465.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/c63qp82dfugce0h63a436024jt/80969857971.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/kerapimubenikunorabip.pdfIn PDF document text
    • https://maturana.cl/upload/file/wevagejegiro.pdfIn PDF document text
    • http://coachhouse.info/assets/file/62404730192.pdfIn PDF document text
    • https://istanajp.com/contents/files/11962839275.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1b6ee03c2---75364697962.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/33155053515.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=wwe+2k16+apk+obb+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_off0000cc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC47 10580 bytes
SHA-256: 8c4d264ba9cf6813b2277650da0ddec255ab27037a556f96852d73ed030f3ff5
font_01_sfnt_off0000e46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46F 17336 bytes
SHA-256: 150c8510d980675c6ed2f87b0108c9b28814ec1b83fabceb97c798f913fd7ab5
font_02_sfnt_off00011130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11130 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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