PDF malware analysis — malicious · eb0546f07a9a8597

MALICIOUS

PDF

78.4 KB Created: 2021-09-06 15:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: deec037b82d144db804df62676830cfe SHA-1: 4f5d00f0f6af956d0fc350b3a01fdb328b9f26af SHA-256: eb0546f07a9a8597d29b3981f976d8b84d31c7015b0616e81ee79831a935c125

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. No scripts were extracted, but the presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://marljivo.hr/userfiles/file/74340791397.pdf In PDF document text
- http://mashhadgardi724.ir/basefile/mashhadgardi724/files/39004907309.pdfIn PDF document text
- http://www.vikingmaterials.com/img/6021883244.pdfIn PDF document text
- http://divorce-difficile.fr/userfiles/file/rotefugagovotagilejerawi.pdfIn PDF document text
- http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f9e3c797f78---retomigefudofarafamudowe.pdfIn PDF document text
- http://rc-modeller.se/images/file///20478469737.pdfIn PDF document text
- https://marljivo.hr/UserFiles/files/43681496384.pdfIn PDF document text
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609418914b02c---nijazu.pdfIn PDF document text
- https://mvmdigital.gr/files/files/taxezugubotomomu.pdfIn PDF document text
- https://digireg.dk/upload/jonerarizizijol.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071658551ced---potinigofamajawude.pdfIn PDF document text
- http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/bijusovi.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750a2a6c721---85880640214.pdfIn PDF document text
- https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/80f3e82e6f445498ad55c27156ba9384/loxawuxiwutuniba.pdfIn PDF document text
- https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/9129a9f1ffc7647ce344b8d96f3cc4eb/80126050632.pdfIn PDF document text
- https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/4b52385b9df87e9717a4f5144b051be2/7694937490.pdfIn PDF document text
- https://zivotzaokny.eu/res/file/zeboje.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dafe6dcec8---81043289636.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a889618aab9---bejumabolas.pdfIn PDF document text
- https://ourcampuswindow.com/ckfinder/userfiles/files/19457136259.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611091cee65d8---87784020758.pdfIn PDF document text
- https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/79a370c68e83cacd168a6520d7a17afc/keminowisu.pdfIn PDF document text
- https://ljlconst.com/admin/images/file/zejedugerix.pdfIn PDF document text
- https://guapa2.com/admin/fck/file/6877308788.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=present+perfect+vs+present+perfect+progressive+worksheetPDF link annotation
- 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_off0000cb6a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB6A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e381.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE381	10796 bytes
SHA-256: `cdeb50c34a6606d5d674cb09e34257d2a24d7089ddc8df6646e8b4e6f023498b`
`font_02_sfnt_off0000fc6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC6E	18032 bytes
SHA-256: `57fa32653b583ffdbc97287aedcadd8302925bd88c0d467f242b193114ae40d6`

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