PDF malware analysis — malicious · 88f70cad3beb2f47

MALICIOUS

PDF

84.5 KB Created: 2021-10-05 10:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: 600790edacddba6f56041715492aa525 SHA-1: 2c8d8b678a1e98513b7debde231feed651259a6f SHA-256: 88f70cad3beb2f4779ec4c0b9537c3f9b9a9c1a217bb95a4aa06b9a208b79e71

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely contributes to the malicious functionality by facilitating redirection or further payload delivery.

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://ketchas.ru/uplcv?utm_term=fairy+tail+complete+torrent PDF link annotation
- http://ave-france.com/pics/files/parabaditowokozuborijenu.pdfIn PDF document text
- http://lltsg.com/uploadfile/file///2021090105233150.pdfIn PDF document text
- http://jongauger.com/ckfinder/userfiles/files/favajoliz.pdfIn PDF document text
- http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jutubemupijujorafamir.pdfIn PDF document text
- http://xn--80aafjbawrcdgsodbdciig4a5v.xn--p1ai/pict/file/47938452033.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a956dcbba6---sarijazuwiwipuripokujelu.pdfIn PDF document text
- https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/313sep7qti6qc5hbte3j5b6jp4/5769623021.pdfIn PDF document text
- https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/5173ebf9dd8a46ec2ada11824572ae48/gomutufigoxebu.pdfIn PDF document text
- http://youngshiny.com/userfiles/file/1631815971.pdfIn PDF document text
- http://immobilieninvestors.eu/userfiles/file/bopezevaja.pdfIn PDF document text
- http://logistra.fr/ressource/site-image/files/50665118070.pdfIn PDF document text
- http://bugaboo-buffalo.eu/UserFiles/File/jazolaw.pdfIn PDF document text
- http://gnox.vn/upload/files/zofokamimat.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155aa1ae3c70---92092410352.pdfIn PDF document text
- http://hairandoil.com/uploads/7848007545.pdfIn PDF document text
- http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3e696db22---86616488545.pdfIn PDF document text
- http://izeninfo.net/admin/upload/files/1314063399.pdfIn PDF document text
- http://musicincw.com/fckeditor/userfiles/image/mutipuxukigosiwarajiwo.pdfIn PDF document text
- https://mtmnetwork.net/uploadEditor/files/63787561768.pdfIn PDF document text
- http://izmirtavla.com/upload/file/97581425245.pdfIn PDF document text
- https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/17151d34d03ded10e6d3cc555d760eee/tutureluxe.pdfIn PDF document text
- http://cropscipublisher.com/files/upfiles/file/fipoxanivaridirubarutit.pdfIn PDF document text
- https://harley.dataroom.tw/upload/files/putilozoririlexeruli.pdfIn PDF document text
- http://www.deco-interieure.com/userfiles/file/87871812201.pdfIn PDF document text
- https://manajrgvaaradhi.com/cms-uploads/files/foxikixanuvutawu.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_off0000e02a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE02A	19424 bytes
SHA-256: `a7925a2ee0a1e0e98f822b2b1f6972b07db8432b3594e11388fdd2e684f3a82f`
`font_01_sfnt_off000112ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112FF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012b16.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B16	10456 bytes
SHA-256: `579584cb7be9860abdeb1ddebbb39c18a74c022ba7e6e2439051fa1ba10956f5`

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