Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede8bed96c9b68bc…

MALICIOUS

PDF

72.3 KB Created: 2021-09-18 20:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3b869edce4c79892c855c33be0cea431 SHA-1: 71506bd218e6bf1d11183484105d4457876533d4 SHA-256: ede8bed96c9b68bc6a05b9341f8d6ab1f1558093ef38b109f32f4d6fd5325865
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of ClamAV detection and ML classification as malicious, along with heuristics indicating a link farm and callback lure, strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ketchas.ru/uplcv?utm_term=gta+vice+city+5 PDF link annotation
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/b4e6a114dd74085f47d7a751f746344f/fogufaduwosadutor.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/dawotuxefizixiwazokiwo.pdfIn PDF document text
    • http://sayarbobinaj.com/file/ribavodune.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/lumepewadaguzep.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613862005cdad---pijaponu.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/xoxefobuduxigataw.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/de89ce4526e964f6c2a7b79f7846b0b8/zurobegakexewitizixowi.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/monifebej.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/35675432271.pdfIn PDF document text
    • http://gibisch.com/files/files/noworipabuk.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/93880409305.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132ed2acb094---20445386717.pdfIn PDF document text
    • http://seoaudytor.pl/userfiles/file/69770897924.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbf9b1210f---bibigetagifomiwifig.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/19130896245.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613991dc15128---48684220123.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/e55f0eba0787596b15a35c3de0f47215/7594046999.pdfIn PDF document text
    • http://status.cz/UserFiles/File/xavunuzakugonaj.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/nadifu.pdfIn PDF document text
    • https://daks-96.com/f/uploads/files/wavafarovedevewarifi.pdfIn PDF document text
    • https://mmszke.hu/files/file/17429024255.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/lililepe.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/59420118075.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA78 16556 bytes
SHA-256: 82d612a6de0444f13b0cf5f97bf12827bf7c797e55292e24d4423dd8d35014e8
font_01_sfnt_off0000e4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4ED 10036 bytes
SHA-256: 13c0d4ab2792879c7b1f57eefd2d8e7edfcd4b3d403a89fd0c78c2a9a5bb840a
font_02_sfnt_off0000fb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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