PDF malware analysis — malicious · 4f86869721f8766e

MALICIOUS

PDF

83.0 KB Created: 2021-09-03 22:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 05670a5daf550e061b2a8a85dab76012 SHA-1: 3e051661f659e4e501e38e091f341fcf14bc158b SHA-256: 4f86869721f8766e717f3303caa0e67e06511b5b6cfb9809325a211abdd21c66

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://irlanc.ru/uplcv?utm_term=mercury+outboard+motor+service+manual PDF link annotation
- http://adabaskimerkezi.com/upload/file/46138012677.pdfIn PDF document text
- http://hongdacable.com/d/files/biwebofegokomurof.pdfIn PDF document text
- http://pamatudarbai.lt/ckfinder/userfiles/files/29375726090.pdfIn PDF document text
- http://surveycook.com/upload/tmp/202108/file/596302805.pdfIn PDF document text
- http://nguoigiupviec99.com/webroot/img/files/tenowatetixudejivu.pdfIn PDF document text
- http://deeringbayrealestate.com/userfiles/files/bojunada.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079403ac963a---rufubagurulukukasefufipo.pdfIn PDF document text
- https://p87.hu/files/34765457017.pdfIn PDF document text
- https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/8c8a94899af9082bbb0184647652a7a6/89735442543.pdfIn PDF document text
- http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c07bfe521a---29579431616.pdfIn PDF document text
- http://apcmagon.com/userfiles/59652303998.pdfIn PDF document text
- http://www.binghan.my/userfiles/file/47742502049.pdfIn PDF document text
- https://bodegoncriollo.com/userfiles/file/zuxipidixasawokuv.pdfIn PDF document text
- http://feuerwehrobrigheim.de/upload/files/70518310149.pdfIn PDF document text
- http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/f9402c5fed61cff9a6a3b2de1ff4a529/31319716750.pdfIn PDF document text
- https://immo-cjeanpaul.lu/userfiles/files/11330380571.pdfIn PDF document text
- https://caribemed.com/userfiles/file/pukozobejotapupixetima.pdfIn PDF document text
- http://pozitron-s.ru/userfiles/file/kojurokevulerem.pdfIn PDF document text
- http://dongsachhanoi.com/webroot/img/files/93138979441.pdfIn PDF document text
- https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/3bea806d2685012351554b26f9e1dca0/jubikizuzibirizanak.pdfIn PDF document text
- https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/b2e2a6a95924c25ff8bd36e284f223c4/70745995551.pdfIn PDF document text
- https://aydin-elektrik.com/resimler/files/werebulugonetopafigolot.pdfIn PDF document text
- http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/30399753407.pdfIn PDF document text
- https://ms02bet.net/contents/files/zinodovebunafekuzun.pdfIn PDF document text
- http://aucoindeshalles.fr/menu/file/sopopuzojivazapom.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_off0000e2d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2D2	16136 bytes
SHA-256: `a9600c9a7c03fb0daf3866c0300efabf952f43afa64ceb68119a253b6a7dd428`
`font_01_sfnt_off00010c69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C69	10944 bytes
SHA-256: `66068d0b5e3b8dd098e4e14e69a88da61a0af4d2f075b5612c3dd628f36b1dc6`
`font_02_sfnt_off000125d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125D2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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