Malicious PDF — malware analysis report

Static analysis result for SHA-256 80620a43e43b084d…

MALICIOUS

PDF

86.8 KB Created: 2021-09-07 22:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5d0a5ef863ceea5564071170ecfa619c SHA-1: fb359320282b4fece57bfee19a835c2c06a4155e SHA-256: 80620a43e43b084d1d77c4f8cfbb65a036a896c04a04fb0fcaa9e94495452cfe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The presence of a link farm pointing to compromised WordPress upload directories and multiple unknown URLs suggests an attempt to distribute further malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc6c16bd0d---16845095114.pdf In PDF document text
    • https://ayurvedaemart.com/uploads/file/382530582.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/rewarudagusoxuwad.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f063bf521---xefusagudusad.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611adf47e546a---nukokinewezizopufuvejuji.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/f6c91debaa66bcab6dc4524a6d896cdc/xasugetifedinaz.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/b717323a2cd4774925618d76480d8340/49521516718.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/rasoxomirigevopojuxax.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/c852578823f25109924bce6f66baf567/tixaroziwezovi.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/2561960648.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a13ad459f2f---81481351050.pdfIn PDF document text
    • http://forti.in/userfiles/file/89661044998.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd21a8e1c5---65476776692.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/xawubagaxitogola.pdfIn PDF document text
    • https://holcom-solar.com/webroot/img/files/96549931543.pdfIn PDF document text
    • https://lifetides.ca/cambridge/uploads/files/muvegobitonejinepo.pdfIn PDF document text
    • http://minniemleefamilyreunion.com/clients/4/46/4626b253669c69ed517e077132fb6553/File/67735525912.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/33013630186.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/2690753885.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608065c79235b---87902527332.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/jiwonuguv.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/nakoxizuwadoluj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=writing+skills+practice+book+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_off0000ec61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10473 18340 bytes
SHA-256: 480c1ac307ee748c95fc5b920c9411b2214e253cea8be956bbde3546e4a53576
font_02_sfnt_off00013418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13418 11020 bytes
SHA-256: 8f51e36d078f37032b50ce86b9db38c112ef3f3b494737b60abfc2565ae651ff