PDF malware analysis — malicious · d9229cfb383e52e3

MALICIOUS

PDF

77.9 KB Created: 2021-07-29 19:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: c7b6bef1bea212025c3ce97682194c75 SHA-1: 693024977bf6d8ad2abf9b9316c6715004ab6361 SHA-256: d9229cfb383e52e31cd3e597ea0090e76608e7f61a843acaf7e6dbdf09072a8e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to potentially compromised websites, suggesting a link farm or phishing lure. The presence of external URIs and link farms points towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9936

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 http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094baefebf85---52260065430.pdf In PDF document text
- http://cipetbhopal.com/webimg/files/jalobut.pdfIn PDF document text
- https://sunarchegypt.com/userfiles/file/10483380377.pdfIn PDF document text
- http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/cb3c94144ef5b794653aace5d15b42b6/mabimoneva.pdfIn PDF document text
- http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9f473581d---21203273192.pdfIn PDF document text
- https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/8irt57519c1enja9od39lqnck4/setuxiwajovunepobewo.pdfIn PDF document text
- https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d39258df79---vunipasodajovipizuxeliseg.pdfIn PDF document text
- https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/9c1cbeb0c0f1ed42da875de8538caea8/namovagosexinitek.pdfIn PDF document text
- http://timebank.ru/sites/default/files/photos/pagefile/zurojagigeba.pdfIn PDF document text
- http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072d98f1942d---99344702624.pdfIn PDF document text
- http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34a1d00d45---ledevomukoxusowipi.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e363cc82353---jotapa.pdfIn PDF document text
- https://oglethorpeclub.org/~oglethor/UserFiles/file/34032205634.pdfIn PDF document text
- http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af808e41c57---87770348510.pdfIn PDF document text
- http://bonfiremadigan.com/uploads/fckeditor/file/91450375305.pdfIn PDF document text
- https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/51oihkma6o4ils82eik4huug0i/98503292240.pdfIn PDF document text
- https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e250fa02db---40045262796.pdfIn PDF document text
- https://southafricapools.com/contents//files/89428844740.pdfIn PDF document text
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/oc26f8emu8ka8dksnhvdta80p7/30245347746.pdfIn PDF document text
- http://kyanite.tv/userfiles/file/14723181218.pdfIn PDF document text
- http://banghaija.com/userfiles/file/78779695982.pdfIn PDF document text
- https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/e0a671334d14e59ab7a4295ce0bdcf05/4209147598.pdfIn PDF document text
- http://shimoltd.ru/images/file/zozazewovelizinowoni.pdfIn PDF document text
- http://splogservice.ru/content/file/9863715840.pdfIn PDF document text
- http://watthaistuttgart.de/userfiles/file/natalipazikukatijuguf.pdfIn PDF document text
- https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbb9b4ceec---21891995428.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bf69f0d66---pokojafezutifadijopuvumo.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=aws+certified+solutions+architect+official+study+guide+pdf+downloadPDF link annotation
- 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_off0000cb65.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB65	16684 bytes
SHA-256: `45979fb9ea6f2f7344a7b775d5e7ff0c77564693c57fed160735f845e82f0082`
`font_01_sfnt_off0000f668.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF668	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010e7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E7F	11180 bytes
SHA-256: `26129dff53e1b5a05480698f278f7b298cd5ea462371d551194fd24dfc30c55b`

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