Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d474ea605f720b8…

MALICIOUS

PDF

92.6 KB Created: 2021-06-28 09:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 031ad189ff875bea7b73feaa48dd50c6 SHA-1: e9f536523f650cd3f91ecbe470d757f804e86314 SHA-256: 1d474ea605f720b81573ea02ec52c0c1dceed8ff2a211873712df70228127ff5
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. It contains numerous links pointing to compromised WordPress sites, specifically within the formcraft plugin's upload directory. These links are likely intended to redirect users to malicious content or phishing pages. The presence of a link farm on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a005a18e344---papigugiwuwatopokire.pdf
    • http://abacusnancy.com/userfiles/file/63487352960.pdf
    • http://adabaskimerkezi.com/upload/file/23838365485.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608440661590c---25185561279.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/ad7b57d62460800aba52ec00c28da9d1/jefokejumo.pdf
    • http://master-sign.ru/ckfinder/userfiles/files/94875202144.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/1fff2fc0a1fff11200cd8f0e3c5f6861/18404816741.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607393bc4c23e---44366489509.pdf
    • https://binarbaidfabrication.com/public_html/userfiles/file/rufasagegozezado.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/6ec5b1d6930fa88084297e4a040eb27c/lukezikumexerifo.pdf
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wumoruziv.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a50cce914a---vufivuxonokuloponamawuro.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/51f52a54f652cbe419186dc0a74c164b/5593687974.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/4d176302aec2cf4710447fa20217f959/94579857824.pdf
    • https://ozmutludokum.com/userfiles/file/tajef.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/pixuwumadanotadov.pdf
    • https://people11people.gr/uploads/File/wuzirifex.pdf
    • http://albino-pitti.com/pub_img/file/sedijivexixuxobosax.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c500a86af8---70651840803.pdf
    • https://airflow-skateboards.com/upload/file/48167099771.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfad0ec8bfd---fotaniwavaguzef.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a9f7e46f4---78184755106.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/5e7069c28c0a739f4985db573b1e25ff/nawizexijubopataxa.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16078d0d7d151f---24694771803.pdf
    • https://powermailer.in/userfiles/file/xulilezazapaz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=the+watch+series+hd
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec19.bin
0eb1b7fedbf71d97094f319a517d3c7157e8a156a184aeec02fad7032fdc0531
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC19 18864 bytes
font_01_sfnt_off00011d6c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6C 16792 bytes
font_02_sfnt_off00013583.bin
e0f6a95b6bf52e801575abc74315928032a35bae575cda1d6be61d5a40faec0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13583 10244 bytes
font_03_sfnt_off00014cbe.bin
8b270b6e4865330d8c6f84aa32f886d96cd31df0c57a3b7d62f439f86d83d105
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CBE 16356 bytes