Malicious PDF — malware analysis report

Static analysis result for SHA-256 f98110aad72ec16d…

MALICIOUS

PDF

81.9 KB Created: 2021-09-02 15:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0b04cf927abdc84e1c74b62d53734be6 SHA-1: 03f0650399ad7173675786dbc5f89adf57877f68 SHA-256: f98110aad72ec16d1f21ebc8c6823986bab3278050649af13d2c1f16a76d5a19
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users to malicious sites. The PDF also includes numerous links to compromised WordPress sites and other disposable hosting, suggesting a phishing or credential harvesting campaign. The presence of embedded JavaScript and external links points to an attempt to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=tecnicas+y+estrategias+de+comprension+lectora+pdf PDF link annotation
    • https://ajitcoatings.com/uploads/82530002856.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/jetoxazadiwubaxexe.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160964f9f1f026---81703993398.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/vixak.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/90725366050.pdfIn PDF document text
    • https://antae.be/app/webroot/uploads/file/rorirunodejun.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/pagedenebudizivapabijuk.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/22918223248.pdfIn PDF document text
    • http://intergeored.com/upload/File/66290132715.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26b2e612ab---jixidijokanupit.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160894b2e70f07---73859917545.pdfIn PDF document text
    • http://schokobrunnen.com/idata/27025134483.pdfIn PDF document text
    • https://promise-land.com/upload/file/varuvuz.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160abd5a22d57d---rumixix.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/filosufuw.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/97911607493.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099dcc38f72a---41864362563.pdfIn PDF document text
    • http://mobilenmr.com/files/files/bemamuse.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/97494508834.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/nimuxuf.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/xajemekozanavepefalip.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/vavupabagubewumexixef.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/79922323768.pdfIn PDF document text
    • http://jr.ac.th/ckfinder/userfiles/files/95524899715.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/fd38b9732192856111eacb38042ca039/besewokizeloj.pdfIn PDF document text
    • http://promador.pl/userfiles/file/wisebugivobapopiken.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_off0000d7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C2 18208 bytes
SHA-256: d379f81ac0e63833c3f8d4b372f45716488cc6d97fbd22073f173dddfe76563b
font_01_sfnt_off00010613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10613 11040 bytes
SHA-256: a1cbd66229578ce24af868bcc775dbe9027cc92d9f570891f3c244282ab983bf
font_02_sfnt_off00011f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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