PDF malware analysis — malicious · dbdad4e0b069fdf3

MALICIOUS

PDF

77.0 KB Created: 2021-07-13 17:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: a56ad54e2a0c88173e760f520c21b789 SHA-1: 57feaeaa02796c85e6b0048b593e21a71e6b11ca SHA-256: dbdad4e0b069fdf31c89cd9130a574a13b4b582acd077fa3c058f78264ea76bf

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9827

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://nomylo.ru/uplcv?utm_term=capital+group+international+equity PDF link annotation
- https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16073a3f314f22---sonevawezexojuvaxowip.pdfIn PDF document text
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf5f8021cf---bavudi.pdfIn PDF document text
- https://baohohoanglong.com/userfiles/file/47387856694.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094d45b8b4a6---13668896592.pdfIn PDF document text
- https://sportsht.com/userfiles/file/jurexavujekafutaxom.pdfIn PDF document text
- https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adfdb99e740---sawowinawusulajumubojimij.pdfIn PDF document text
- https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/cff9e0956616b50e7179c800746bde63/10307198411.pdfIn PDF document text
- https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/6a8825bc3f5c04b7c431fb91d926a050/58970545531.pdfIn PDF document text
- http://marinapogon.pl/upload/file/garekadinigixitedebalumo.pdfIn PDF document text
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/e57fcaccc746f0a039dfd14b982251e4/43755781724.pdfIn PDF document text
- https://gregor-biffiger.ch/userfiles/file/fisag.pdfIn PDF document text
- https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/9h3ndkmns95u1p2nkhm44pqd8r/85110668280.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c017cc688b8---96429917328.pdfIn PDF document text
- https://aakritidigitals.com/userfiles/files/89774798319.pdfIn PDF document text
- https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/f4b54f989c61a9f314a2c12e17fd35e7/seserolewebop.pdfIn PDF document text
- https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608631df3cfa0---tifomafulasa.pdfIn PDF document text
- https://samarpanbharat.org/trila/userfiles/file/rarisalun.pdfIn PDF document text
- https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/f4f5a9e58242bc2ed50727c4d8b75de3/neziwelisakajusedozax.pdfIn PDF document text
- http://lycee-elm.org/userfiles/file/patofebe.pdfIn PDF document text
- http://tamlaproject.com/userData/board/file/93884712470.pdfIn PDF document text
- http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16084e34e3073a---48743589285.pdfIn PDF document text
- http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/8826479782.pdfIn PDF document text
- https://rumusjitu.com/contents//files/pejesadefabaxuroj.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b535891b396---dumulogeb.pdfIn PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/812025b29cabfa830d9d20cad4ecce8e/zatikuwakupa.pdfIn PDF document text
- https://incoyun.com/calisma2/files/uploads/nejokibefozezuw.pdfIn PDF document text
- https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607561adeb453---tevitujejudotimapaxawev.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cb4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB4F	16528 bytes
SHA-256: `afe9e98841179b320573d0fefe591351fdd0b7d8a969750cb313de5eb27a0a1d`
`font_01_sfnt_off0000f656.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF656	10652 bytes
SHA-256: `6ebb04564c83e78936a1c52b098a9804e8651645fe5bcfe27bb6987ddf81568c`
`font_02_sfnt_off00010e90.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E90	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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