Malicious PDF — malware analysis report

Static analysis result for SHA-256 8894bd6c482002ef…

MALICIOUS

PDF

79.7 KB Created: 2021-10-14 11:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8757ec1720ea310a611454a3d8000e52 SHA-1: a719c5de2774dc36234e91a8061d8391a8911206 SHA-256: 8894bd6c482002ef4c8643514381e81d6fb2404e837039faa000a3c7ba2254ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or appear to be part of a link farm designed to obscure the ultimate destination. The primary attack pattern involves directing users to these external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://garglob.ru/uplcv?utm_term=independent+hair+stylist+near+me PDF link annotation
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/fidemizetubinawatosovav.pdfIn PDF document text
    • http://fullprotec.com/ckfinder/userfiles/files/fapinimitulowumadav.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/30582255732.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/16868674875.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/80416098048.pdfIn PDF document text
    • http://mousike.it/img_ins/files/37109093267.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/17520968387.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/26084576972.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614993314582f---wibolujin.pdfIn PDF document text
    • http://tiquital.com/documentos/file/259643453.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/22337173685.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210922170316.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/e2c222ca32ddc94ba870927b08d5c1a9/tadudivapokov.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/74889562441.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/32025389683.pdfIn PDF document text
    • http://slotkuda.com/contents/files/57190068156.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/61033025667.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/97615030047.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/rasufezevudunud.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16151a10e7d4e7---8918058156.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/nulasusibexoz.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/punituni.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/44935552615.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///51612458862.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161570d37c0386---tanugofajelur.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_off0000cf0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE720 18428 bytes
SHA-256: 47acec537ae608809fe8d514fcdc42b8b6fd4dbedfa9fda1940a4c737e78a229
font_02_sfnt_off00011797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11797 10604 bytes
SHA-256: 341c491c68e17d2208572e86785f780da12ffde2330dc2a76bcaf42078392c8a

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