PDF malware analysis — malicious · 3cbb8ef5857dd7bc

MALICIOUS

PDF

79.6 KB Created: 2021-06-30 22:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: ea21bbebc982e79b007032aee88b785b SHA-1: a8061be144375b6f642e2bee631d56e72e47637e SHA-256: 3cbb8ef5857dd7bc5f2b2ee879a84ef363c53166dc51aa2399bcb16c92e86eaf

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is unreadable, but the heuristic findings strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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://drafthe.ru/uplcv?utm_term=microbiology+laboratory+manual+cappuccino+free+download PDF link annotation
- https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/813b6a80503340f242acfce38c1254e4/5930999611.pdfIn PDF document text
- http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160995700f2130---55791704919.pdfIn PDF document text
- https://nhorizontours.com/userfiles/files/lokelotakej.pdfIn PDF document text
- https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b92018e42---segeji.pdfIn PDF document text
- http://ymmicro.com/files/files/nafarenobetapedoka.pdfIn PDF document text
- https://hondamienbac.vn/userfiles/file/pabotixak.pdfIn PDF document text
- https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9d65dea77---45592789471.pdfIn PDF document text
- http://kawoka.com/userfiles/file/51821405278.pdfIn PDF document text
- http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609aeceeb9820---98474960616.pdfIn PDF document text
- https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c164faef47e---romonux.pdfIn PDF document text
- https://satuldelut.ro/ckfinder/userfiles/files/rutimuruwasanagukavex.pdfIn PDF document text
- http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/f45bbb89a08444d0c5dfb7f38813c624/75988023356.pdfIn PDF document text
- https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/991eb8d20b04cbe971d09ec53a1363dd/famejoxuso.pdfIn PDF document text
- https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/4f31df9a7219546c52074817f310ea85/77410879371.pdfIn PDF document text
- https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/4cdcf46972843cc9057f13966a7e6692/3760323674.pdfIn PDF document text
- http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c34f92d049a---14917194102.pdfIn PDF document text
- http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/f003eb6428fba750f2d591cf3e417a8f/22342823307.pdfIn PDF document text
- https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ce9d7c0bbf7---gujesugafefopipizupamuzet.pdfIn PDF document text
- https://avigailpekelman.com/sites/default/files/file/75493413900.pdfIn PDF document text
- http://akgikorea.com/file_upload/fck_upfile/file/padoka.pdfIn PDF document text
- http://ricarda-allegra.de/userfiles/file/mepawolijepimarezuju.pdfIn PDF document text
- https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4ca5541d0---34732338762.pdfIn PDF document text
- http://paroissedementon.fr/upload/files/99744456046.pdfIn PDF document text
- https://area5srl.it/file/79465399792.pdfIn PDF document text
- https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/eb2739d7a019685319afa05cfdb877a9/9763722379.pdfIn PDF document text
- http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160770194dcaa3---xakemufemev.pdfIn PDF document text
- http://aksaaydinlatma.com/img/editor/image/file/bezavafofuladaf.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d2f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD2F4	16740 bytes
SHA-256: `cb5eac87f9ed745e768b5b7404a5c5e3c149f91ba6693b2f3ec8b446a36fd0fe`
`font_01_sfnt_off0000fe71.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE71	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011688.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11688	11228 bytes
SHA-256: `f2ca074e3702e9270039020a99a68eeea0f0e0fbb4e785d4f0deb8b80ebe6362`

Open this report in the interactive analyzer, or submit your own file for analysis.