PDF malware analysis — malicious · e7e4109c192a9e57

MALICIOUS

PDF

92.6 KB Created: 2021-06-26 00:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: c28fedda3bfa0def61e00d830d97fb56 SHA-1: 519d0b5da7176a5884b97abe10ad7623e1e9c05b SHA-256: e7e4109c192a9e573455a89f7330f7144f86e0eb7fe8f18b63dd044a9d2c2ad6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and potentially compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9786

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://inwebjor.ru/uplcv?utm_term=circumstances+in+meaning PDF link annotation
- http://kahounova.cz/userfiles/file/32272893894.pdfIn PDF document text
- http://griswoldremgmt.com/uploads/files/5180099256.pdfIn PDF document text
- http://skomi.ru/img/files/file/96572830919.pdfIn PDF document text
- http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/0tufnat90fmlp065dng8fov5e2/pixofoz.pdfIn PDF document text
- https://alnahamgroup.com/userfiles/file/1130958828.pdfIn PDF document text
- https://nic-irq.com/userfiles/files/51557909359.pdfIn PDF document text
- https://anaksemut.com/contents//files/siwejones.pdfIn PDF document text
- http://toshiteriyakiburien.com/uploads/files/61236193075.pdfIn PDF document text
- http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908747eb10b---dexewugizowedigifafaguni.pdfIn PDF document text
- https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/972c283a3f891b320485666383343022/45823444311.pdfIn PDF document text
- https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853c7eb82b8---88027136424.pdfIn PDF document text
- http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/955633033609b5a4d33938.pdfIn PDF document text
- https://artbynela.com/uploads/file/zitol.pdfIn PDF document text
- http://livingkaneohe.com/userimages/36587150781.pdfIn PDF document text
- https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/92192edf81196282e252ca47c5b32378/98085377001.pdfIn PDF document text
- http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbfedad8dc---xegevagizilegamajima.pdfIn PDF document text
- https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2b1d3bfb3---kajabemeduzinizova.pdfIn PDF document text
- https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160742fe6356e6---99577003584.pdfIn PDF document text
- http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/faripevawadorex.pdfIn PDF document text
- https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/3699501098cdb41233630a0232ff2eee/napoxujex.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859d9520aeb---35263874306.pdfIn PDF document text
- http://caigeshi.com/uploadfile/file/2021061908431073499.pdfIn PDF document text
- http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607895038d814---65303510822.pdfIn PDF document text
- https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/s573bgpqr5i3amnkns656n9il7/6782097856.pdfIn PDF document text
- https://manuscripthandler.com/userfiles/file/95563497798.pdfIn PDF document text
- http://thanhlapcongtykiengiang.com/upload/ck/files/99111611343.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e929.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE929	10540 bytes
SHA-256: `10c3bddd515b7c11dc642d36bfc6eb081a12e4c9d2ea666c475965fadc9621ec`
`font_01_sfnt_off00010130.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10130	20052 bytes
SHA-256: `3541008c486e8365c54db4c9d4ac33ee4690978335f65e149b1634cccf1ab612`
`font_02_sfnt_off000135fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x135FB	16060 bytes
SHA-256: `8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825`
`font_03_sfnt_off00014b0e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14B0E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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