PDF malware analysis — malicious · ae2873d0a9757939

MALICIOUS

PDF

85.7 KB Created: 2021-09-06 22:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: a8e719eaf9236ae04c448113bd030689 SHA-1: 7c0aa7c1d652957f2b798f8a04c8bc5efa555107 SHA-256: ae2873d0a975793990734874a0190e2e180ab7c61edc69309e3306f15747093b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and it contains numerous embedded URLs pointing to potentially compromised websites or disposable hosting. The heuristics indicate a link farm strategy, suggesting the PDF is designed to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://allytemp.ru/uplcv?utm_term=junqueira%27s+basic+histology+14th+edition+pdf+download PDF link annotation
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160df197cf35ca---2959359996.pdfIn PDF document text
- http://sushi-belovo.ru/files/gegegitebusamepu.pdfIn PDF document text
- http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9fe666600---vikusefabonimaw.pdfIn PDF document text
- http://casier-a-bouteilles.fr/file/16681613393.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/7183orfkgdmbn3c75p7jao8cid/muwiwen.pdfIn PDF document text
- http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1611587b4f3159---21143545086.pdfIn PDF document text
- https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/4de4426f4409ed83604d6d35f234fc33/rusuketanijobufabizovud.pdfIn PDF document text
- http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de5c952b816---luzejikipipevomus.pdfIn PDF document text
- https://shivajigrihnirman.com/singhania/downloads/file/fozipume.pdfIn PDF document text
- http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58906994689.pdfIn PDF document text
- https://semineebrasov.ro/printuri-fi/files/1849129647.pdfIn PDF document text
- http://fizjoactiv.eu/Upload/file/dagidebezunadis.pdfIn PDF document text
- https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/3a8523b7be40d2054532307e1118b570/pemivavoxusomukusime.pdfIn PDF document text
- https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160dc27bab625d---91475631914.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/832e802c1e0c15cc4faeae43edb67d16/99533052288.pdfIn PDF document text
- https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/16865b593a5196a0535889c26e12b7e8/vogopipokubig.pdfIn PDF document text
- http://antifftech.com/uploadfile/file///2021062608192873.pdfIn PDF document text
- http://rc-modeller.se/images/file///sufasuparara.pdfIn PDF document text
- https://procogs.com/FCKeditor/file/2031983867.pdfIn PDF document text
- http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bc88afd94---vomilezuwevebajekax.pdfIn PDF document text
- http://rkmaster.ru/uploads/files/tidali.pdfIn PDF document text
- http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b18b188c1---25308079803.pdfIn PDF document text
- http://cancercareresearch.com/userfiles/file/70783548526.pdfIn PDF document text
- http://fincasotilloviejo.es/files/sotillo/_repo/file/9463391260.pdfIn PDF document text
- https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/52772250a5ba7285213910dcbbddf754/xafajatideze.pdfIn PDF document text
- http://dgjinhak.kr/DATA/upload/files/202106211254267585.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_off0000e706.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE706	11640 bytes
SHA-256: `2ca30b3b3ee4fc11f74227a1462cbb67396a853ee1302cf6b1b90ea839e29559`
`font_01_sfnt_off00010228.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10228	17596 bytes
SHA-256: `53c78d5a66a7a1314b72807bb70f4c0ecf0ea22d9d691e36c29e6c787596acb7`
`font_02_sfnt_off00013005.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13005	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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