Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc2af1ec4e28776…

MALICIOUS

PDF

82.7 KB Created: 2021-09-03 04:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef24f62bc9c31b9ab4b25580bf599107 SHA-1: 482d81c6b600052bf2b3871a70667549008d3581 SHA-256: edc2af1ec4e28776f199a658bca693626259664869ce09a9f02d0c9002607aaa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites and disposable hosting. This suggests the document is designed to redirect users to malicious content, likely for phishing or to download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9827022c7---9187285962.pdf
    • https://shopexpert.com/app/webroot/files/userfiles/files/wupifumewotaberal.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed2647c4624---vidolinopaponozimujoxo.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/8rmoptbgvqme5bas76mr43j3a0/mozufinixategatedaniloxo.pdf
    • https://twinslock.com/locktactyuma/userfiles/file/5494674071.pdf
    • http://fst-uinsu.net/userfiles/files/71340622836.pdf
    • https://uetty.xyz/js/ckfinder/userfiles/files/36804403467.pdf
    • http://zrdb-drogbud.pl/Upload/file/18214864813.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d68d09f961---66562047606.pdf
    • http://rivieahk.com/clients/5/51/51325344bd1517f257d6959d5350918e/File/jewinusowiwozivaxo.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609a666fec88a---2402962142.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/dotulutas.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/161006a82463de---vavoriditunifomax.pdf
    • http://studiotecnicopinto.it/userfiles/files/49638017544.pdf
    • http://vivatbacchus.hu/files/file/jagomali.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/49fc0f3a5980edf871884251a6390815/79183781253.pdf
    • https://soudurelauziere.com/upload/editor/file/jurudixowikun.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/23987514979.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/4c3f6d2970d5c5c0a051e0014c3930f0/muvakufitefib.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607db73c9f38a---88268739512.pdf
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/gafisuwamabimafuture.pdf
    • http://indecomavo.pl/inc/32635796905.pdf
    • http://uptownfallschurch.com/uploads/files/99865305947.pdf
    • http://tuanlongland.com/upload/files/jokojaf.pdf
    • http://smartickgroup.com/userfiles/73825644449.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=philosophical+analysis+in+education+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddcb.bin
cfef67d16d2c017ae5419565be8f892a8926f5b7314a18635ebed18ecf104f62
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCB 10832 bytes
font_01_sfnt_off0000f6c6.bin
e8b078b8f0aa5bd42625b71d079fd3700205825b37b72b95839a17fd64c4e112
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C6 17732 bytes
font_02_sfnt_off000124cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x124CC 16792 bytes