PDF malware analysis — malicious · 38713bc583ed6da8

MALICIOUS

PDF

79.2 KB Created: 2021-09-05 19:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: a0e744594e7d2c69461ca9326ac9fde9 SHA-1: 0a34b88b656867a8310c030cfa88715709b6c158 SHA-256: 38713bc583ed6da8bc02c932a0c5c7bca4a788644a3ad2210186d7cd6f554a94

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms. The presence of 'utm_term=exploit+sql+injection+manual' in one URL suggests an attempt to lure users into clicking on exploit-related content.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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://nothingbutsafetyglasses.com/userfiles/file/zuvokutujufegazilofud.pdf In PDF document text
- http://kuzfarm.ru/images/file/kawuxuba.pdfIn PDF document text
- https://suacuacuontoanphat.com/upload/files/46172714470.pdfIn PDF document text
- https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/844dbd55d879694c8e07f74a74633301/tulopabokur.pdfIn PDF document text
- https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/5u4bdk4l689hd6ahqpctgr5equ/67168832552.pdfIn PDF document text
- https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/6f2c2242c9c824dfc60de7edd9bb4a62/17211613122.pdfIn PDF document text
- http://artside.org/data/temp/file/legevodomidenato.pdfIn PDF document text
- http://umrllc.com/userfiles/files/letevaragetunopalisusurak.pdfIn PDF document text
- http://digivideos.net/ckfinder/userfiles/files/ninakazabikotudidelojug.pdfIn PDF document text
- https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/3fbbdae9759bbd54c59c8f16d8b05cee/dupopetikufize.pdfIn PDF document text
- https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/fr9dcon14ohhipo18re3f37ual/50322576568.pdfIn PDF document text
- http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125563db326e---duxiruzupenoligawol.pdfIn PDF document text
- https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/a8df27f1cf9c2648962570d012e1d55c/43615801789.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610def8da74c3.pdfIn PDF document text
- http://coimbrasoftware.hu/images/uploads/files/29825957188.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608275096fa42---winawemomafikusos.pdfIn PDF document text
- https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da429c1b6e1---kebawefupinojavegeporawo.pdfIn PDF document text
- http://studioguatta.it/userfiles/files/wovixuxemivasogorivejuso.pdfIn PDF document text
- https://folklorebridge.eu/uploads/pictures/files/58967916533.pdfIn PDF document text
- http://aps-mes.com/files/file/53783892169.pdfIn PDF document text
- http://gpkoaee.ru/ckfinder/userfiles/files/jasola.pdfIn PDF document text
- http://kasystemofkarate.com/clients/861259/File/82063277001.pdfIn PDF document text
- https://winpoasia.com/ckfinder/userfiles/files/16436164267.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811fc478dc6---52567079241.pdfIn PDF document text
- https://liftsystems.ro/LiftFiles/file/82220988770.pdfIn PDF document text
- http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16127312792f4d---50482329809.pdfIn PDF document text
- https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/a0094f9cac4867081165378b55ff3fcd/taganofi.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=exploit+sql+injection+manualPDF 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_off0000ce1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE1C	10896 bytes
SHA-256: `ec06a43e25bc79a5233ba8adb5bab341daf862471fd1e590f132bd31147e9d7a`
`font_01_sfnt_off0000e746.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE746	18812 bytes
SHA-256: `cd582e71fdbbbb53847de9098985ff5d781323e2001422d6b9224688ea0ff71a`
`font_02_sfnt_off0001170b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1170B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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