PDF malware analysis — malicious · f6fff09bb64a5faa

MALICIOUS

PDF

89.6 KB Created: 2021-07-26 10:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: c3fa125819a90825471ac72cf5ef969a SHA-1: 6ae2e1a9ae10b3a8431137396c596cd3855768d6 SHA-256: f6fff09bb64a5faaee8c7c07aadac73d62f12f9e1695f8db7686a3748871ee55

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this, indicating the document is designed to host a farm of links pointing to potentially malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9875

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.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607284513520b---fipoxazuzimavujajeko.pdf In PDF document text
- http://beateromer.com/bilder/file/14690717020.pdfIn PDF document text
- http://www.yoko-ono.be/images/userfiles/file/22654305367.pdfIn PDF document text
- http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c91a9de3922---13747817444.pdfIn PDF document text
- https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/798613370c1cae35b425978825e71278/25965391426.pdfIn PDF document text
- https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f44e4388aab---tavovilukegodikan.pdfIn PDF document text
- https://biodent.ro/m4fm_files/m4news/ck-uploads-files/29983409372.pdfIn PDF document text
- http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8edf67e8d2---5047665696.pdfIn PDF document text
- http://angelescare.com/userfiles/file/46003381712.pdfIn PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c3a34fe5b---litari.pdfIn PDF document text
- http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wexumajinimesozirufo.pdfIn PDF document text
- http://joyearland.com/ckfinder/userfiles/files/dovuzedorarefebaxunoxaf.pdfIn PDF document text
- http://vervesimuhub.com/userfiles/file/pajifitufugufozudu.pdfIn PDF document text
- https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/5167d460476a98429f03ba3a49487171/29335762333.pdfIn PDF document text
- https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16079c940a0c75---kaxevuvo.pdfIn PDF document text
- https://mariellatriolo.it/public/file/ketotokezamuvo.pdfIn PDF document text
- https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/380891fr1p7u47mjou357p6l64/80217125475.pdfIn PDF document text
- http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/0e27a97b84ea376846a3f59ad2a4714a/32642017403.pdfIn PDF document text
- http://annandale1963.com/clients/69704/File/vudepowabanure.pdfIn PDF document text
- https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/7c9go7ncrpu2o4tkth4m8o61hc/29461925861.pdfIn PDF document text
- http://titadoorbinhduong.com/upload/files/zinumumirivupogixo.pdfIn PDF document text
- http://residenceraffaellotorino.com/userfiles/files/30199410490.pdfIn PDF document text
- http://chonburi33.com/userfiles/file/madojujivukizexawojigak.pdfIn PDF document text
- http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46eec04f83---31871901700.pdfIn PDF document text
- https://agencement-menuiserie-var.fr/stockages/files/23068234300.pdfIn PDF document text
- http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cee96ffb0---79252645660.pdfIn PDF document text
- http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f898e6aab6---gufudesifuliwarisa.pdfIn PDF document text
- https://arab-hams.com/Ups/files/lazamag.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+recover+trash+google+drivePDF 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_off0000fa0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA0B	16992 bytes
SHA-256: `fa4b058035e4e9a1a2ae87b99abf16616df9fd293ce58059f4de73a30033e0e4`
`font_01_sfnt_off0001269b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1269B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013eb2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13EB2	10688 bytes
SHA-256: `9f6903a9876f395cb43e00c8abf5ab4b9907dead342158a65a6fff0351927112`

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