Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a242d986a647ae0…

MALICIOUS

PDF

90.0 KB Created: 2021-07-18 18:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12a31534e427023e03f4874fd441bb4a SHA-1: 6b19625dba3f76e1b08ae42b415e92007ac2c117 SHA-256: 9a242d986a647ae030e24192b29f230b0649d28129568ebe338eea50a547ac5f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites hosting further PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to these compromised sites for further exploitation or phishing. No scripts were extracted, but the structure itself is designed to facilitate malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160ecaaf7c8c74---ganepuxakosodovoxexizaz.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091cf26b7df5---95925848386.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/3a7e85c9b20caae5b0483b737bed12d7/pidesofesimunekupujufena.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/1da33072c254a0ceecf6d32683bc6d43/30457690050.pdf
    • https://kuepancong.com/contents//files/17374721631.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825ad28051c---pikufaxajatotel.pdf
    • http://zdravi-kromeriz.cz/files/file/lukugefodujixekegoxumixo.pdf
    • https://condicionamentofisico.com/arquivos/file/54153709033.pdf
    • http://k-yoga.org/file_upload/spaw_upload/file/20210507124309.pdf
    • http://www.awakohchang.com/image/upload/File/utipigudi.pdf
    • http://brandnewgoods.net/userfiles/file/82144519109.pdf
    • https://menu2uplus.com/images/file/73301073574.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/7f20772453acb7dfd59c33c23efb5588/90344466668.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/9463062130cdd2d209b0fce140b0edb1/90867294093.pdf
    • http://akcjonariusz.com/UserFiles/file/vagijagigezodoxefidurogo.pdf
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607727e66d3e0---vuvinegoremos.pdf
    • https://hosvagyok.hu/userfiles/file/28558552624.pdf
    • http://crystal-lamp.ru/uploads/files/kebulodude.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074c652ade01---safiperexe.pdf
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/11664183272.pdf
    • https://trotusgrup.ro/ckfinder/userfiles/files/dodilarabilofur.pdf
    • https://iword.de/userfiles/file/3691442253.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4864c399c5---22146709743.pdf
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/werowerabejolaxenis.pdf
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0628/7974ec7c39309e85708dad59d2650b31.pdf
    • https://bisnismedsos.com/userfiles/file/12684161169.pdf
    • https://mariellatriolo.it/public/file/73662582503.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=today+our+5th+wedding+anniversary
    • 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_off0000fbe2.bin
9a4002ebe72c7989fbd4cd7d6184eb5f0f94c1ce42dee0c85d2f7126ed682f4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE2 17528 bytes
font_01_sfnt_off00012951.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12951 16792 bytes
font_02_sfnt_off00014168.bin
28fe8575db662d43b147fd78102a03d2050e0bd8f017f26e407adda2d2a3b2b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x14168 10944 bytes