Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab05c26a22b21480…

MALICIOUS

PDF

86.4 KB Created: 2021-06-27 07:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b17e06ad32fd3700f970e9be1cdc63d8 SHA-1: 918038bfa79c50920a4a059040ae72a03f509c7a SHA-256: ab05c26a22b21480319d51b76369b9e4c6b713740bfa6586b88841ae36f8398f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on compromised WordPress sites and disposable domains. The primary purpose appears to be phishing or distributing further malware through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://chcial.ru/uplcv?utm_term=my+entire+body+hurts PDF link annotation
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/619b3c8b806ff1faa691398df30cda4b/73222607717.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cf8cee499---gumikagatilazifexunun.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/37129615894.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/5c4fc84d258e215c7685d6f6e1ee1aae/peneninowezejov.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/xexifetolesabejorujufiz.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7mfbtucem3ib5pdm0f8a1cb7r2/lobawarutak.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a374c0d1e9---luzedade.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210514/210514192107982893gfg3938gv469.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071970221acc---26150441244.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a64c501aef---vunefuvok.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/86fb0247f30c9fbc7cbb1088f053fd8c/47848422825.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/29152469268.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a327585c605---tajoj.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/39242250504.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/namenifafixa.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/voxiso.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/ug1kp759u7tln047t9e6deai16/56963551338.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/3tuu4fem4ot5o1fbdu1md5n3ev/kamofarilowavofupetileb.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa23c8d90f---96295498338.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a36b7bb67---xedafabem.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/55440775098.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/pugidujowuvifibagiwudi.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/4a0646cd11d171754af2b3e93e69b261/60001143085.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/7d2fa941a76c0b41ea4e383b6ec4622e/92930636724.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CC 17440 bytes
SHA-256: 54919d71efb5ad8e8051ffe0493a38daeae15c633a3ab251a567546db74ace97
font_02_sfnt_off0001335a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1335A 10484 bytes
SHA-256: 1c71e4ceab6d5d0aebc3953a1acfbc7e3b2a1b58514e862094901035838c9d8a

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