PDF malware analysis — malicious · 999afcd2a098019a

MALICIOUS

PDF

80.3 KB Created: 2021-09-19 06:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 84efe8f6f597d8b8fd2f48e5667a6591 SHA-1: c8a89ff6401181be78b626a8a0ea1eb8b311989f SHA-256: 999afcd2a098019a1dce74c26b3b3614c13fad110ce1716399005581f52b1c9e

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, with one heuristic specifically flagging it as a link farm on disposable hosting. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to redirect the user to a phishing or malware-hosting site.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/ebd953d16fd1d46ba09aefbe83569b51/lasizugumajupofesuz.pdf In PDF document text
- http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/37507997377.pdfIn PDF document text
- https://mlbcsimleague.com/ckfinder/userfiles/files/lesemamolajux.pdfIn PDF document text
- https://medicabg.com/uploads/wysiwyg/files/lisewusanedezejud.pdfIn PDF document text
- http://envigest.cz/upload/file/65293419419.pdfIn PDF document text
- http://www.tecnobor.com/ckfinder/userfiles/files/sivagenafubevogamubilu.pdfIn PDF document text
- http://infas.cz/images/wiswig/file/jekuxudifodozoxosoxopafej.pdfIn PDF document text
- http://labotinnghia.com/img/files/woxavorilu.pdfIn PDF document text
- http://pincesorvarshop.hu/editor_up/petufavagivudexederim.pdfIn PDF document text
- http://botosani.ro/img/uploads/file/96822226868.pdfIn PDF document text
- http://kapfenberger-schuetzenverein.at/userfiles/file/venoxemonajepuf.pdfIn PDF document text
- http://waxiangyuan.com/upload_fck/file/2021-9-19/20210919020127783564.pdfIn PDF document text
- http://mim2010.ru/userfiles/file/lelajopebovavim.pdfIn PDF document text
- http://kartinatv.org/uploads/files/89914843312.pdfIn PDF document text
- https://www.groupe-coelho.fr/ckfinder/userfiles/files/zopuzibule.pdfIn PDF document text
- https://aiwatopup.com/ckfinder/userfiles/files/popanabipufowusezeroxaw.pdfIn PDF document text
- http://cluboutletmoto.net/campannas/file/jeletex.pdfIn PDF document text
- http://trendstyleimage.com/uploads/ckfinder/userfiles/files/74229530403.pdfIn PDF document text
- https://uetty.xyz/js/ckfinder/userfiles/files/18911857339.pdfIn PDF document text
- http://connect-event.fr/ckfinder/userfiles/files/10478231590.pdfIn PDF document text
- http://www.hon-ro.hu/userfiles/files/fudipajisatenijabirozunum.pdfIn PDF document text
- http://promocode.lu/userfiles/files/35287090252.pdfIn PDF document text
- http://snft.ro/media/file/36371587920.pdfIn PDF document text
- http://shrlie.com/upload_fck/file/2021-9-4/20210904133614646153.pdfIn PDF document text
- https://tagoproperties.com/ckfinder/userfiles/files/20844852025.pdfIn PDF document text
- https://kurek-rowery.pl/user_pict/file/78231589.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+find+the+vertex+of+a+standard+form+equationPDF 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_off0000d31a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD31A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000eb2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB2C	17924 bytes
SHA-256: `a1dc24e6193572f4095b0a26e086e660be15ef8db7934c6b03831b1beb72e106`
`font_02_sfnt_off00011980.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11980	11064 bytes
SHA-256: `1e5663e30a8df770603a8d2718947e4410b7ba7c501d31c9f2d69e8974a5d0d1`

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