PDF malware analysis — malicious · 86068f927088e9d3

MALICIOUS

PDF

85.5 KB Created: 2021-09-06 06:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 0642c8efea346ad00fb95d670eb8d3e7 SHA-1: 62b286efc8ea6f0ec975c7225dd08cb6fa20f860 SHA-256: 86068f927088e9d32b811dcb1fdc7f762932d0bc57067af054cecb3f36a0ae1a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile indicate a phishing or credential harvesting attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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 http://screen.by/images/file/1254792359.pdf In PDF document text
- http://gzky.cn/dubeite/ckfinder/userfiles/files/20210607_205534.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bf2c404f4---82276666762.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/85a8f4277979c3c9494318ef3336a292/xafirivivokegetixegozob.pdfIn PDF document text
- https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/356223e8807059e8e36c96dd4584ba83/vuzezepidadetowipuxu.pdfIn PDF document text
- https://signika.pl/Upload/file/92931971571.pdfIn PDF document text
- http://elturo.ru/img/upload/files/36472102563.pdfIn PDF document text
- http://telegid.tv/userfiles/files/wokema.pdfIn PDF document text
- http://essentielles-theater.de/UserFiles/File/bubuzuzupafeberibo.pdfIn PDF document text
- https://armandofalconi.net/userfiles/file/61290976142.pdfIn PDF document text
- http://ahcxdq.com/uploads/file/021628557760.pdfIn PDF document text
- https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/xugotazepenufezi.pdfIn PDF document text
- http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1610401de8008d---nakozabiwominimavozod.pdfIn PDF document text
- https://gonguyenkhoi.vn/upload/files/xajajikujewiner.pdfIn PDF document text
- http://residencecarlofelice.com/userfiles/files/tinijizigidozag.pdfIn PDF document text
- https://www.chablis-gautherin.com/ckfinder/userfiles/files/81945767121.pdfIn PDF document text
- https://unitedfightalliance.com/ckfinder/userfiles/files/mufutijirunemakinavewupod.pdfIn PDF document text
- http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161309148e3a31---denijeduv.pdfIn PDF document text
- https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/ngifgf8rgfsrmakk33mo34uhr2/tumisi.pdfIn PDF document text
- https://imotrading.com/images/userfiles/62938823948.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bfb28e61bf---xapagudelo.pdfIn PDF document text
- https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d7c2e898028b4fdd084b62a8dcf03393/13498740200.pdfIn PDF document text
- http://amphorabeautyclub.com/campannas/file/8660781173.pdfIn PDF document text
- https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/ad6e03fe26c60312e67ff93a757c8642/vibupuwop.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074809c40529---jutalutixubetowezu.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=formulario+ds+160+en+espa%C3%B1ol+pdf+argentinaPDF 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_off0000e2a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2A9	19204 bytes
SHA-256: `bdda2f623531adc81dadfa15335af7a93ace75579a32f2218008199d9676fefc`
`font_01_sfnt_off0001138c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1138C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012ba3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BA3	11468 bytes
SHA-256: `462a0c499627666991fa39e16666334b4003f7e9ab3429339b05d83f460f0906`

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