Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9598d0774fb196…

MALICIOUS

PDF

129.3 KB Created: 2021-08-12 13:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5f556999a0c4579aaa60a375ea3bd527 SHA-1: 2f1dbf8d328cf616135bf75fca0f8f1c6f2f2943 SHA-256: ed9598d0774fb19684cfde5ccc0a924911d28fada3d9368e0f9d2867ef01bc09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous external URIs and link farms pointing to potentially compromised CMS uploads and disposable hosting, suggesting an intent to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the links and the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=schema+cellule+animale+pdf PDF link annotation
    • http://euro520.net/userfiles/file/162128964662007474.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/79750563063.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/palulofod.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/kuwitakasinasazudekonoxis.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/r602h0g217g53s1drrmikjdju0/nuxoja.pdfIn PDF document text
    • http://health-bridge.in/upload/file/76238508243.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160887f99635b9---tilopozijulavu.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/53739525770.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1cff2bbd8---nofunexenosudi.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089460262fa1---vexazulekeduxoxov.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/905qnfu2nnmc8c0e090ljle06r/76684247678.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/90986745524.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/23946121541.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/aavt9r91hblpl01ch0lmk2qv5i/92765374746.pdfIn PDF document text
    • https://ienter.bg/files/20232827802.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/48c0b8fc14c7adb5061bf9fcf4b7dd0f/ruzirenajipadejegunoju.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/68548b2cae5da4ec21698eb09b4101d4/76351160797.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/6f60376d356f987602fb300f7594e9bd/4267669575.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/57350333084.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/59aa1d54a23faa8fc0857a2729a03415/gikojenufogiluba.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/vixirajugeveb.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/5de169b623dfe94074dbb6ec6f209c7c/lilalo.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/35ef7ed07c7c0a1dde6f0ab16c440e0b/wawitosiwulekemagumug.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/zagizovadewiluxu.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_off00019145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19145 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001a957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A957 21040 bytes
SHA-256: 0e505c867323d7b1eaf26ae910f4e073994682c5e916b1f38565ca1ec7ed6d7b
font_02_sfnt_off0001dd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD88 10572 bytes
SHA-256: 365170ba2374fc87779e0ca0c9aeacd128a2ed15b02c159ba745c87870a218f6

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