Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aba722112aad14a…

MALICIOUS

PDF

102.5 KB Created: 2021-07-15 10:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ce23b91a86ebb718f0f2d708cf2f1534 SHA-1: 6a56ea8660956cb69e7db24a12262452f0b937f6 SHA-256: 1aba722112aad14a0d61cd3eac1f1fe1f2189d7dd0a6af1b7a7ee9853962786c
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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
  • 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.
  • 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://huntic.ru/uplcv?utm_term=syncope+causes+and+symptoms PDF link annotation
    • https://mszukam.pl/dat//file/6969151034.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/1cd7898e69080466d4b81ffbcdc37ec1/63707225249.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/c0l1g7v1c0kjl9ql1ipdie3ocq/57897524840.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160763c7486e1c---77012555405.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/99c367ed47f260e05d223f382aa04ee6/dopogewemudave.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/sikixaledigofusijevexaze.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/0027b90822f73f5f2396b8ccaa4dd875/89107521440.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/zojosutuxajaz.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160853a4bccf16---29915294446.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/56401172094.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e8c460b999a---zonoz.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0eb0cb038---64850165880.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842cf364016---ruvenap.pdfIn PDF document text
    • http://amandamaitland.com/images/file/21406665715.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/1e1ccd591dc679de483da344982ed61b/97930784162.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607248b73dba4---bogewumigamedupemusub.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbc4257255---loxovuruz.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/33632829031.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/xevetujupes.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/mimagexakofipisumapekamu.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/s4donigq7pbmdij83ms3tqih05/75004583196.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/376bef087a08ca6c3cf1e608cd941d64/6366824250.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/f029d19af3fa763cae964b4fc6b77927/97042406851.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_off00012fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC4 10724 bytes
SHA-256: 8e411e79c406650a752e0f115c0bb8b09131cd9a93cdf07dc5271983459a57ba
font_01_sfnt_off00014872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14872 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16084 16916 bytes
SHA-256: 99c8527aae74ddacd2234bea888c03b809a1ebce66d73a795e26c10a88957147

Open this report in the interactive analyzer, or submit your own file for analysis.