PDF malware analysis — malicious · 35029a897f8543cb

MALICIOUS

PDF

90.8 KB Created: 2021-06-25 20:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: ab4bcf911f7844dee8227dbd13ccad53 SHA-1: f1b0f0dd6c7e60e297c6fe987c4b5edf3061ba4f SHA-256: 35029a897f8543cbd4faf72e99255a0e0b5ef236d013182434cb7ce623cfa6ca

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites hosting PDF files. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting an attempt to obscure the true malicious destination. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document, likely used to lure victims to phishing sites or download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://laborke.ru/uplcv?utm_term=how+to+export+from+word+to+pdf PDF link annotation
- https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf88dd99538---78207419232.pdfIn PDF document text
- https://beautyyaurient.com/editor_upload/file/zafupegokuv.pdfIn PDF document text
- https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ea34bc3ac---fezuvotatibezozatulet.pdfIn PDF document text
- https://franchiseharbor.com/files/files/sasobikixalijuwovuto.pdfIn PDF document text
- https://mfdesign.hu/files/file/jasebesijokomofudadakopib.pdfIn PDF document text
- http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa209d3264---zazukasa.pdfIn PDF document text
- http://baovephuongtroi.com/vietkiendo/upload/file/97164751430.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c862573983a---xureduwagorukobotakiv.pdfIn PDF document text
- http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fajajazuxiliva.pdfIn PDF document text
- https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/fcsejsm2d4d6ah3ndl5p996hk2/kagedufe.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082e087b6c5d---nizopisifumesebiw.pdfIn PDF document text
- http://sotel-perm.ru/site/file/fizuzepojobid.pdfIn PDF document text
- http://asvpp.fr/pdf/75753838997.pdfIn PDF document text
- https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebc7eba89f---samabugi.pdfIn PDF document text
- https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609abae98cdb6---mosukujonenug.pdfIn PDF document text
- https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc13b5d1a66---59501708518.pdfIn PDF document text
- https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/f46c15c5450762088a907deba6b5f79f/35237983528.pdfIn PDF document text
- https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/967e718b49e69c5efa032eaa1c61e4c6/rijudotepobijupisi.pdfIn PDF document text
- https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/767d29716e63cd47b6c17a050504f242/53254376881.pdfIn PDF document text
- https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/ad534c3eb80a8ed61a8858508c1cb2b7/62486680201.pdfIn PDF document text
- http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/minasokexuxomasixe.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608035c4b21cf---35178014346.pdfIn PDF document text
- http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/a10144025a937584e575c63bc84bd1ef/40968348423.pdfIn PDF document text
- https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/ig5424o060db8je34sgunhrc35/titofevewomek.pdfIn PDF document text
- https://poolpoint.be/uploads/file/jomiwuwole.pdfIn PDF document text
- http://kaowei.tw/image/files/20210529_131815.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_off0000fcff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCFF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011516.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11516	10264 bytes
SHA-256: `a647f06f7ae55c8b505cc4d6fc1c73d815903e986726dd0e4ae0e4ff6e69cc68`
`font_02_sfnt_off00012c30.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C30	18040 bytes
SHA-256: `3edcd5ab02ad2e37dc8b79c5e004401aae99cf90cd71cb17900d86a567e035f6`

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