PDF malware analysis — malicious · e9c4ac5be7911b7c

MALICIOUS

PDF

88.1 KB Created: 2021-09-05 11:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 00de95d47ab69a0772dd618e6151ea20 SHA-1: ac9f5844ef85792c767c70b5a75e0d2346a32860 SHA-256: e9c4ac5be7911b7c82a9816330ff267394faa3f3c011db88997aed2ed94136e9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the structure and URL patterns are indicative of a link farm used for initial access.

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://garglob.ru/uplcv?utm_term=18eme+siecle+siecle+des+lumieres+pdf PDF link annotation
- https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/ccfc54d5ac6c7d4bf357c2912d6802ca/girugemabo.pdfIn PDF document text
- http://psychologyforeverybody.com/ckfinder/userfiles/files/gotadumiverubujon.pdfIn PDF document text
- http://driver-jazda.pl/upload/file/82158358833.pdfIn PDF document text
- http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/wopudizet.pdfIn PDF document text
- https://kamarkosong.com/contents/files/9226578170.pdfIn PDF document text
- http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a14e41f89---34526037.pdfIn PDF document text
- http://goodtraefarm.com/ckupload/files/tiputasatisel.pdfIn PDF document text
- https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8de7250b0---tiliwa.pdfIn PDF document text
- http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdd5a721f6---matopekazozevuromo.pdfIn PDF document text
- https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/30a623430de0866e332b0388897b9b4e/ludufebavojovurup.pdfIn PDF document text
- http://porpora.info/imagenes/imagenes_contenidos///taloninazex.pdfIn PDF document text
- http://djarkitek.com/temp/vinney/HTML/userfiles/file/xiniwakepavamavesawajifiz.pdfIn PDF document text
- http://vipnjl.com/userfiles/files/92992659606.pdfIn PDF document text
- http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607235797cd72---7989178851.pdfIn PDF document text
- http://newtrierreunion1962.com/clients/6/64/64567561842b0bbd40b956adda0282a7/File/99008777440.pdfIn PDF document text
- http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/supevixekonovifoxexi.pdfIn PDF document text
- http://myshiou.com/uploads/files/202108300319513898.pdfIn PDF document text
- https://ruxthai.com/ckfinder/userfiles/files/tajuzulenimuwemaropo.pdfIn PDF document text
- https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/d2a6b1f0e8559972459a68ec024b64fe/tuvojimirijarodipubi.pdfIn PDF document text
- https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900d94c1c4b---55847253481.pdfIn PDF document text
- https://cometsecurity.in/admin/userfiles/file/69358808213.pdfIn PDF document text
- http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2bdb76b67---kisakudiwoxezovu.pdfIn PDF document text
- https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/83e870d6b3bec1569f132ad152b6fc7b/25860750874.pdfIn PDF document text
- https://retake.dk/ckfinder/userfiles/files/33731772264.pdfIn PDF document text
- http://af.ssla.ru/images/fornews/files/fowagodefot.pdfIn PDF document text
- https://btegypt.com/file/gabese.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_off0000ea1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA1A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001022c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1022C	22368 bytes
SHA-256: `e36af854b8ee339513aa22a6b7e6f09e213fff851b3097650313c088cb761f6c`
`font_02_sfnt_off00013a7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A7F	10560 bytes
SHA-256: `38a11592b70014c1e910e09c8fda845cdd8a99e3ff9a3dd93072e0d6cc6b96c3`

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