PDF malware analysis — malicious · 48040c392df1878c

MALICIOUS

PDF

87.5 KB Created: 2021-07-06 03:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 5f0add2b088246400bb3f3ec90022a4b SHA-1: a203996eed99838ec180d170e231cf6b24546207 SHA-256: 48040c392df1878c8b5b912b4e1f23962e6b72b7ab8860a4d9dbe93d46bd757a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external links and the PDF structure itself are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

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://philabc.ru/uplcv?utm_term=aleister+crowley+book+of+lies+pdf PDF link annotation
- http://teerosy.com/ipp/images/uploads/files/xuwexexaduwadagokeferim.pdfIn PDF document text
- https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607239bc59301---14551331306.pdfIn PDF document text
- http://fst-uinsu.net/userfiles/files/91389365381.pdfIn PDF document text
- https://dodatkireklamowe.pl/web/uploads/files/sitobutas.pdfIn PDF document text
- https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/032b16ca98301d9de4a31ff3da9cd27f/80670122277.pdfIn PDF document text
- http://aklond.com/UploadFilesfile///2021042910452010.pdfIn PDF document text
- http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/7b413ba50872e4d2f90d70de0ce38c7d/7574996788.pdfIn PDF document text
- https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/bkjg3c1khnmic3k837uf0itq4i/mubosixogagukutos.pdfIn PDF document text
- http://ekolojikweb.net/upld/userfiles/file/lisulowolozaramo.pdfIn PDF document text
- https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/4pem18bdifrc32joi02o1hdj7o/67897724290.pdfIn PDF document text
- http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae3efcc5c3---lubajelam.pdfIn PDF document text
- https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/n9gqc8e75gs0jrad7dkebokcqn/zipevujexuvatanofudakov.pdfIn PDF document text
- http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608e48c10a551---2789963578.pdfIn PDF document text
- http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/0a3122b25039bd38d6bbe99db4b63349/80410741093.pdfIn PDF document text
- https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/0460300c1c4567220c60d23ef5182ac4/jekeboma.pdfIn PDF document text
- http://aelma.com/sites/default/userfiles/file/1746104476.pdfIn PDF document text
- https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/10b0574c537c6fd811796291b25335e8/wonajukowojitibo.pdfIn PDF document text
- http://ranaghatpchsschool.org/userfiles/file/bokij.pdfIn PDF document text
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/0dpacf1jve344thjctn06ujfps/rutanomibapi.pdfIn PDF document text
- http://muszempilla.com/files/file/najezixiwijixemebisezoz.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/984769666cef221cfdc989602b2b6d52/43894309712.pdfIn PDF document text
- https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/bo81tf8p7fa9f4jipjvu7onnn6/sulobetorimariwiw.pdfIn PDF document text
- https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/819d8a931fc4d6ab7eb48317982775fd/dajutomoxogopi.pdfIn PDF document text
- https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/f4ef6babafa57c31be07065187aa61a3/luleba.pdfIn PDF document text
- http://www.thaiboat.net/image/upload/File/88367949473.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_off0000ddab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDAB	17444 bytes
SHA-256: `b908de82676fb35a69983655801d2371a87679cbd5611cea6ffecfa5e27585e6`
`font_01_sfnt_off00010b39.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B39	16088 bytes
SHA-256: `450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c`
`font_02_sfnt_off0001206f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1206F	10760 bytes
SHA-256: `07c6767fef2a080a97122d366404a08fd0e22884b9648cf0da332c39dbd4d4be`
`font_03_sfnt_off00013938.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13938	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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