PDF malware analysis — malicious · 84fc9f0e686c25a9

MALICIOUS

PDF

89.0 KB Created: 2021-07-07 01:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 60c6849db8489b05715af4294097517a SHA-1: 856a1ffba268a0516dd2cacdf47774f376424f8b SHA-256: 84fc9f0e686c25a95a796ddff742526eda95982cb4f6b0d74adfb08bcd7a0936

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, potentially leveraging JavaScript for redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9558

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://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/8k186rg7ve4dmrkjv52u07n7ek/4253681199.pdf In PDF document text
- http://dnepropress.net/files/file/97420456641.pdfIn PDF document text
- http://zonweringbelgie.nl/ckfinder/userfiles/files/xazogubefitogisixozow.pdfIn PDF document text
- https://rhodium.vn/uploads/news_file/wusezuzatefujafiximi.pdfIn PDF document text
- https://itacademyindia.com/ckfinder/userfiles/files/59213156427.pdfIn PDF document text
- http://planetamama.ru/files/file/86485463461.pdfIn PDF document text
- http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609018e8824b8---18548909450.pdfIn PDF document text
- https://stallion-international.com/userfiles/file/rupadijanugeso.pdfIn PDF document text
- http://cadeco.com/testingsites/advantage_aviation/assets/media/file/9359696233.pdfIn PDF document text
- http://shannonlakeestates.org/fck_images/file/76381825195.pdfIn PDF document text
- http://mextro.de/upload/files/49715977206.pdfIn PDF document text
- https://chameleoncoupons.com/adgprocessing/uploads/files/61372575703.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/68520453569.pdfIn PDF document text
- https://carlojans.com/cms/file/kuravowogomesi.pdfIn PDF document text
- https://almoheetmanpower.com/public_html/userfiles/file/85835227397.pdfIn PDF document text
- http://cp-tournament.org/ckfinder/userfiles/files/5166174135.pdfIn PDF document text
- https://maximatrimony.com/ckfinder/userfiles/files/96107499700.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e04283d4ca4---63874293727.pdfIn PDF document text
- http://gdbchurch.com/clients/43262/File/tenesiruxajid.pdfIn PDF document text
- https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/c94e2067234def11176f4c528f35d02f/zaboxofumewabimesiledul.pdfIn PDF document text
- https://vyrukrc.lt/userfiles/file/tuxafi.pdfIn PDF document text
- https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986e7734787---wenolufuxonumem.pdfIn PDF document text
- https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/1c9dd471ff77502e00ebd05e7d4b75a9/423265037.pdfIn PDF document text
- http://alphanaturehk.com/userfiles/file/13395393299.pdfIn PDF document text
- http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608231199a11a---sobetewu.pdfIn PDF document text
- http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095de6412569---rumale.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=superm+as+we+wish+ep+1PDF 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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000caca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCACA	2060 bytes
SHA-256: `106f3049c73b800bd7e762213fc17957f41051ea82d4089b9f52d6178cae0cd0`
`font_01_sfnt_off0000d422.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD422	16696 bytes
SHA-256: `1f88900eb7484c67c77f65d2d89b33316e52418daae00dcd057bd84c8cb542e2`
`font_02_sfnt_off0000eba7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBA7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off000103b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103B9	22016 bytes
SHA-256: `a588808b36f8c76dec166765216f036f86ffc4084cc1da04913d9d7eeaece7fe`
`font_04_sfnt_off00013c06.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13C06	10464 bytes
SHA-256: `2d37c2d61bb262c05818516d3364415a29a689e5be1fd22994c25f8292ba9049`

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