Malicious PDF — malware analysis report

Static analysis result for SHA-256 0973c2a771c35950…

MALICIOUS

PDF

81.3 KB Created: 2021-09-04 08:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 336f96dad085780e27a708b27d2bae90 SHA-1: 03e76fd4c8bf994b38489a21e53a35923db709f3 SHA-256: 0973c2a771c3595001d09406b2b52594abe73c0e493f95a4f1bc37a910de408e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers strongly indicate maliciousness, with the PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifying the link farm nature on disposable hosting. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb22826d3f---verumojedumel.pdf In PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/m471r7ea1tiedjr3lvbdeuc2cr/45031743015.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/juvegederulex.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607dabaa216ab---divixofuwenefabasasosa.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fc3a5532f---jegodorexavawuti.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/vofobafuroregoxulamesa.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/e983vobr6vsh3871hq214fou8j/15733091391.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/nagugogiw.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/161043ce411441---52563270158.pdfIn PDF document text
    • http://rancholasmonturaspremios.com/campannas/file/lupini.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/1b8082c94990438c449a5ff88ac56158/91916710551.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/49898886753.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c626275c35d21b904abb415fc5ba16c6/17166101433.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/37439998539.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/40168314904.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160889f07a53ac---piposafofunobadifaloruf.pdfIn PDF document text
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/16916001008.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/7u29199gi4eeea0hjok038utdm/vosunutivivepofo.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160e92308f37e7---35093435350.pdfIn PDF document text
    • http://balone.net/_upload/file///46532318521.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/gogadebokipetozemigano.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f23a9030b---negoxakisaxol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=hand+foot+and+mouth+disease+adalah+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA96 16992 bytes
SHA-256: 6bedc6ff42f5c704c302f264669af504b463aff4400dd3f170869910d2b283ed
font_01_sfnt_off00010719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10719 10752 bytes
SHA-256: 19fc2b0641803f78b83cbc2d2fab48a78a1f535b2d8a6ecc3ed6d12bfda55009
font_02_sfnt_off00011f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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