Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b1688bd5c44af2…

MALICIOUS

PDF

78.2 KB Created: 2021-06-24 15:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 11ad4961d69e90ac94c9efb966dbe49f SHA-1: a97f6e9019a5e2e4d04c520af6cb5cd5f236cdd4 SHA-256: a7b1688bd5c44af25e53b9e1e14c0ca21ae17073dc2044b2a18b7e0b0d21684f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e70feda4e---51665243061.pdf In PDF document text
    • https://paymentor.nl/uploads//file/jirosuvow.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/poxumu.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b03c734089c---vumigewow.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cbfc1bd19---46728903981.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f98f6c5274---fibukazose.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/29ed6098e02027326d3d8a68e3953bc0/29493112336.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf8dbd7285---jogazidabanibinekima.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f290dfdab---bidarifiwabum.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/e4fc3299e7cb3661841b82566a136873/33419974169.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/dadegiwumos.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4b5bda7f581a3eb032baa7e298b4c010/83063393454.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/lrm925smk23j7r5k29676ikuv6/42947877373.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/0k1r6tp9blkjbda0c4p20ltna7/jedemodofejoraxid.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/bazopute.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607797038b4bc---23161979923.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/euopu72cdip4gcjc93omf2672p/wazolebipepeja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=anime+battle+arenaPDF link annotation
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD062 3728 bytes
SHA-256: e76fa76366fc5146283c444325771cf654fa17879e75d9bfa54e43838bb7358c
font_01_sfnt_off0000dd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8B 4780 bytes
SHA-256: bd2478675e504a15fbec13f5c380151b3a49106a4972f0265968f79a3bbe9fd7
font_02_sfnt_off0000edb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB3 13116 bytes
SHA-256: f0b5d4c6e39f3d31ed0b77f28fe641230e7b56f6cd9acf3d0997bd3b73b30c45
font_03_sfnt_off000116b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B4 16100 bytes
SHA-256: b0627a486dcaeee434fe5ad07bf169d6615d29e40b70de469c6017e3e4f2a7cc

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