PDF malware analysis — malicious · 9c561c784cae2510

MALICIOUS

PDF

83.9 KB Created: 2021-09-05 12:37:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 7ebaf1774405799b807d56c950b661e0 SHA-1: d6526ab18513e5b18fd17aebceca4d6562bd643c SHA-256: 9c561c784cae251011b51e1abd2962969f1a2d0dc1c085836efd7406055b360b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users. The presence of external URIs and the overall structure suggest an attempt to lure users to potentially malicious sites for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/e704ff0b3864f5406c0df18c748b7c87/59819514179.pdf In PDF document text
- https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f667eaecb8bcc6d14a446eed90bb7146/zasegerenuwimosudobej.pdfIn PDF document text
- https://globaltranslation.com/demo/global_translation/beta/userfiles/files/zenofel.pdfIn PDF document text
- http://dothi.info/images/files/56466443876.pdfIn PDF document text
- http://stopguepes72.fr/userfiles/file/labazimuwutal.pdfIn PDF document text
- http://akkoryazilim.com/userfiles/file/lefakiz.pdfIn PDF document text
- https://villadorottya.hu/uploads/frontend/files/raritixo.pdfIn PDF document text
- https://rent-1.es/ckfinder/userfiles/files/67349831881.pdfIn PDF document text
- http://openendrep.com/userfiles/files/jarepuzol.pdfIn PDF document text
- https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610455377406f---62025410970.pdfIn PDF document text
- https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109e8e36e687---maxeleni.pdfIn PDF document text
- http://zimaletto.com/uploads/file/99210761990.pdfIn PDF document text
- http://efuegypt.org/userfiles/file/nowudabexevagibun.pdfIn PDF document text
- http://ceomit.com/fckupload/file/83851426769.pdfIn PDF document text
- http://integrotech.com/zdjecia/file/jekuliki.pdfIn PDF document text
- http://highendschmiede.de/highendfiles/file/vawonobudanusipad.pdfIn PDF document text
- http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c657e5e8f---81485941419.pdfIn PDF document text
- http://asokmontridental.com/userfiles/file/14117118860.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce87685d98c---27544529031.pdfIn PDF document text
- https://verandapattaya.com/userfiles/files/vunana.pdfIn PDF document text
- http://klefmarken.se/upload/file/duzabefefufikexaxakuv.pdfIn PDF document text
- https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/6c8jbogv50o35va04nq1vleb2i/920602104.pdfIn PDF document text
- http://chipgene.com/image/files/20210725_222605.pdfIn PDF document text
- http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160875274d7a86---zeramagibuwimi.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=esl+colours+worksheet+pdfPDF 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_off0000e3ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3ED	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fbff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBFF	17412 bytes
SHA-256: `fe2ec88c040fde0fe658d0783ab7b897a95743089bf154a163517487ec7d2232`
`font_02_sfnt_off0001296e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1296E	10620 bytes
SHA-256: `ed79e9e0107382860a9e032b4b6a58f2fa80d1821f1d2d0e5aac0ecc2d3f2d5f`

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