PDF malware analysis — malicious · c12695790be45212

MALICIOUS

PDF

85.9 KB Created: 2021-06-28 01:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 0a858b57954912ac05b2f00bc13a5a08 SHA-1: fe3cb6153a2320ffae4b3032997869ce95aa2a20 SHA-256: c12695790be452128ee7d0535053be734729d7e22723bce977fdc84e4428a26b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites and other potentially disposable hosting. These URLs appear to form a link farm, suggesting the primary purpose is to manipulate search engine rankings or redirect users to malicious sites. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

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://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/b51f63cc14545763a6a42613fe1ac0a6/50381273035.pdf In PDF document text
- http://www.houstonorientalrug.com/ckfinder/userfiles/files/setefamesu.pdfIn PDF document text
- https://gastrotest.co/ckfinder/userfiles/files/74891401038.pdfIn PDF document text
- https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/a7db3f9858743fe22c3fb88eae3fd7bd/wixogamo.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/26393246545.pdfIn PDF document text
- http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a684fda7db3---45944316309.pdfIn PDF document text
- http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/f0b31933b5d9a5d256dc2b063497e2b7/wovewevutumomotivigukel.pdfIn PDF document text
- https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4fe3ed145---29035291163.pdfIn PDF document text
- http://hud101.vn/webroot/img/posts/files/ruwupajapiw.pdfIn PDF document text
- https://atpl.aero/ckfinder/userfiles/files/dufunowibonupezazogixezo.pdfIn PDF document text
- https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8f6f8983f---67977518548.pdfIn PDF document text
- https://wita.lt/images/files/38589118570.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd2a0a9234---40276998702.pdfIn PDF document text
- https://blugarden.eu/file/77396520844.pdfIn PDF document text
- https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a240804ac9c---65713493521.pdfIn PDF document text
- https://ascinfratech.com/clientprojects/trading/file/mixedediv.pdfIn PDF document text
- http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160928f2eb7ba5---xukupujekuzuvolodibofarup.pdfIn PDF document text
- https://shiokerbau1.com/contents//files/fokipirunaruka.pdfIn PDF document text
- http://antonioruizabogados.es/userfiles/file/mumuvakisamuso.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1e282b365---mizolifutamo.pdfIn PDF document text
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/fc7663a4f10a1fc73ffcb6fb15a3c047/bawulazepifevibolaz.pdfIn PDF document text
- http://doverhighschoolhalloffame.com/clients/2/2d/2d76883e1086210ef8e2c43836b0327f/File/bezapesomup.pdfIn PDF document text
- https://iwistw.com/upload/files/78236232201.pdfIn PDF document text
- https://condominiovillage.com/userfiles/file/92525803734.pdfIn PDF document text
- https://kede.org/userfiles/file/46512031424.pdfIn PDF document text
- https://vildmarksjagt.dk/userfiles/file/zojilipalepo.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=store+bought+eggnog+ingredientsPDF 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_off0000eded.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDED	16996 bytes
SHA-256: `6229bfa4fb1442de4a5b1fa2f4e7a53b7f90ac221f5d454d87cc3827bd4c3569`
`font_01_sfnt_off00011a0a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A0A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013221.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13221	10632 bytes
SHA-256: `d65814d01f484819144b39a1fc74ef5df18de0fc111329f02bb1d1943dc33b94`

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