Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebb8d5467a79368…

MALICIOUS

PDF

96.4 KB Created: 2021-07-04 15:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6bdfb7245e12aca6fd26e46396783daf SHA-1: e823d23287da48024703d6d90ce78c54655057a0 SHA-256: 7ebb8d5467a7936871f4662fe5e70d5add181a168e21396d2797fffbaf926f15
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://abwva.com/uploads/files/94098235102.pdf In PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/b7e6fd3304931c5cf7126125d9982b27/90363941685.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/46986907659.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/zunasuximi.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074b1c2b5e1b---jidagidixu.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/wubexusazosom.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/muradedezabe.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a60dfce1569---68958335485.pdfIn PDF document text
    • http://1960ihs.com/clients/e/e0/e0b58928a48036c9af8d6cfc9cffdd99/File/53628989600.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/15353530203.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/87c7e4d77f3d69e4295777eac80e5cb6/44421589641.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/5375951664.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/51308596884.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/13522229919.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076d03062c2a---kekupavoxuzijuse.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073f7c66152d---gupufomuma.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/kogubabevozufis.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/4d8995e39312e4b3b1b6c0456bab7cae/rosop.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/nemuwusuferumopodogifuje.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16073b8687b4fd---bukaj.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/95970055547.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=propagating+a+chinese+evergreenPDF 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://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_off000115ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EE 10676 bytes
SHA-256: 4bac5c74eaaa616a7f4279d457fb420de2953678a659fd551d85a3a8c2eebd41
font_01_sfnt_off00012e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E62 17688 bytes
SHA-256: 7c3a6cca3c164a61203670d198d1e481fd4caf3844ca9c81e6153efc3019333b
font_02_sfnt_off00015ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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