PDF malware analysis — malicious · c3c5d141f9cb6fa2

MALICIOUS

PDF

78.1 KB Created: 2021-09-06 06:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 2212958dbebd2ff47e568b70916a0369 SHA-1: fb68071c8fa29a6310cde15968224138ff492631 SHA-256: c3c5d141f9cb6fa2e55c3b05582dd6f13cf3ccb6d192dd86a0957a4dc78eeb06

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 websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. The presence of 'utm_term' parameters in some URLs further supports the idea of tracking user engagement with potentially malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://krisoc.ru/uplcv?utm_term=vedda+blood+sugar+remedy+pdf PDF link annotation
- http://linhkienhunganh.vn/luutru/files/4498083358.pdfIn PDF document text
- https://tl-systems.hu/files/files/rasawejowifepu.pdfIn PDF document text
- https://digireg.nz/upload/4382164207.pdfIn PDF document text
- https://oncallanatomist.org/ckfinder/userfiles/files/dubefas.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5ca2d354d---84200244328.pdfIn PDF document text
- https://stehovani-ostrava.cz/static_pages_files/file/juxodudesaredaxevo.pdfIn PDF document text
- http://synfarm.com/upload/files/95107322877.pdfIn PDF document text
- http://ledspectrumthai.com/ckfinder/userfiles/files/xenaxuvevewunuxi.pdfIn PDF document text
- https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/2944c085021e828bf05dfe55af044be5/86056303729.pdfIn PDF document text
- https://sieuthimayphat.com/ckfinder/userfiles/files/34992911288.pdfIn PDF document text
- http://akinmedikal.com/uploads/file/3444998717.pdfIn PDF document text
- http://autodilykanka.cz/cmsimple/images/file/fedubibofarakibede.pdfIn PDF document text
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/4a930b3bc6add07ce38c7269ff49db1f/41442931705.pdfIn PDF document text
- http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b36ca554497---7386306198.pdfIn PDF document text
- http://0575zl.com/userfiles/file/robedalodifojexazaseraj.pdfIn PDF document text
- http://cdhsalumni.com/clients/28864/File/kamajigeper.pdfIn PDF document text
- https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/a2c814cb27b983993ed8569c402e641b/musizesisewavi.pdfIn PDF document text
- http://dashoernerboot.de/userfiles/medewenexo.pdfIn PDF document text
- http://yulintimber.cn/d/files/93668671202.pdfIn PDF document text
- http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/a2gco70mgu2ll7ara03jmu3n11/besesoguforugoxepevufox.pdfIn PDF document text
- http://a-swiss.com/upload/userfiles/file/957835367.pdfIn PDF document text
- http://www.deopendeur.org/imgUser/file/59334822383.pdfIn PDF document text
- https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/8e00f7a0c9bb4018c1b0f8c536b947a6/potegavu.pdfIn PDF document text
- http://moonlightmontessori.com/upload/files/66213111037.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_off0000cf1e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF1E	16752 bytes
SHA-256: `dc14b760bff236f458e51aee28f3cfbf61484d1a7de881b2851e57e682d4cab8`
`font_01_sfnt_off0000fa1f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA1F	10868 bytes
SHA-256: `4fee303f654bdd8dc44ea3714edf129bca24312dc6f00f0e4ddb10c9df523137`
`font_02_sfnt_off000112de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112DE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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