Malicious PDF — malware analysis report

Static analysis result for SHA-256 492f954a52224f07…

MALICIOUS

PDF

93.4 KB Created: 2021-07-04 13:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 263f25832cf511c57875f9b47e2cfd59 SHA-1: cc9a6deb3aa8d579f8c326a08061cc3d90eced1a SHA-256: 492f954a52224f07f6a4e486607dcab4ea33707ad7bb0e61ccd15752157e93ce
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content or phishing pages. The document body is heavily obfuscated and unreadable, providing no direct clues about its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://infrive.ru/uplcv?utm_term=meaning+of+gossamer+in+english PDF link annotation
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085c2904d909---34309098215.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/80109160347.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/8it4jl20lpu42lklavt9bf7olf/difod.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/10229398399.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074d10c3a34c---72350500773.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/46432968151.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/fovezaj.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/kawagubulevopezinisukew.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4aa201bb7---74609860677.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ttqt3f9kvbur01091fs2fm3h40/59363623603.pdfIn PDF document text
    • http://axwelindia.com/uploads/pisezakigijivifevedegug.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/aadab5e02aefc354cb87be40b745ccd2.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/96346064384.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/588131dece9dcc734d2da806fd662f4c/bimexejakak.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0016e59169---wewalotuboforo.pdfIn PDF document text
    • https://baptistfriends.org/media/92794602160.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/0ordji5mtuqead5npiq6ph49q5/74345081760.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e04522f7d0---56464417038.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/81136170150.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/qcdl3durti87g3g52hpuuls39i/18606095.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/jduc025j0qtgvksfqqcamuleq6/kejixofizuxasekeb.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/17210485003.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/90863382988.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000d60c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD60C 18180 bytes
SHA-256: 5ddc784ccc0d0c5aeb9ed506cec8fad3a6e030c971d7a643f69a61ccb92d75bb
font_01_sfnt_off0000f2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DB 2644 bytes
SHA-256: aa57df8c54efed65c5871cd45d7ce13a6dce93bb2f0a5b502ff6603d5c8d1daa
font_02_sfnt_off0000fe30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE30 21772 bytes
SHA-256: e22b2a44c8e1291b7ff006a68535554cce0d84355cc69450056b1f7093ceda4f
font_03_sfnt_off000135c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00014ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DDB 10556 bytes
SHA-256: 485095da3b2b7e41042c961bb91336bf5e34ddfba492560eba83943c2662fe3a

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