Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d4dac74f225d8e…

MALICIOUS

PDF

74.0 KB Created: 2021-06-28 02:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ad4ac5eee38c24f4330295b9099a9680 SHA-1: 7e8f22acf469eb24daa78440c371843924caabb3 SHA-256: 70d4dac74f225d8ef646f44461f833a898a3e8298a104f9b62bd4ee706f86f4f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous links pointing to compromised WordPress upload directories, suggesting an attempt to lure users to malicious sites. The presence of many distinct hosts and UTM parameters further supports this as a phishing or distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/da935d3a54e195028b25f3c1dd0cbaac/66339392218.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/hi9urt6747rihteci8ov2pmqj2/tosiz.pdf
    • https://semsaesp.com/ckfinder/userfiles/files/minujikivovo.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3a69ba214---50926452700.pdf
    • http://jatyn.cn/upfiles/202105/file/1621402685.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b649012865---5783100448.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/icdrmr24t80tenmr489ptqb5n3/64222219771.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/v8k610cgrnl707v41uedv9keg5/xivorasojakimasufaxafa.pdf
    • http://crmloccitanecr.com/campannas/file/sebediruwo.pdf
    • http://premsaktidal.in/userfiles/file/81197285171.pdf
    • http://maychamsocda.vn/images/userfiles/file/94864785510.pdf
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/19b26689a0fe5960638bbfddcc66308f/14989167265.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a16af569137---kodakoxe.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/nib4arfm8dn2afbi3mh3n3qb20/66785157272.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608700b978dea---30826447626.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/0dl632uedsab9m6f67t95fhu0d/gaboxasomakanage.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad30b639ad---kigidenasikoxox.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/6c08ef76554b8be6ceea050a1291d42b/tavotagakojitasuvimibe.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791d95e705f---12398247484.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0b8b13923---14767313047.pdf
    • http://anatolianlgs.com/userfiles/file/36885334731.pdf
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/jejobimanedumuvosoxav.pdf
    • http://visit-pune.com/userfiles/file/53493955755.pdf
    • http://centroolosprato.it/userfiles/files/suweninopitaxezuxilave.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=all+these+horses+in+my+car
    • 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_off0000befc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFC 16792 bytes
font_01_sfnt_off0000d70e.bin
53a2bd7543130fe807b8813f184aa987ae1e59589149dda43683b6dfe925fc57
pdf-font-stream PDF embedded font (sfnt) at offset 0xD70E 16888 bytes
font_02_sfnt_off0001015c.bin
9a20de6f3e77df27694672c7dca03e377fcc938cdb79d7aa7904102e457d8a03
pdf-font-stream PDF embedded font (sfnt) at offset 0x1015C 10592 bytes