PDF malware analysis — malicious · adf07df88577e072

MALICIOUS

PDF

83.1 KB Created: 2021-07-03 01:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: b7f81f531a8dcb633d134a980df34df9 SHA-1: 9a2bb8d45c3907884e94cd76b4af828373914237 SHA-256: adf07df88577e072de0e3ed9443b6a2c3f4215b6778f2ada52195a6e1e3aec38

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and appears to be non-readable content generated by wkhtmltopdf, further supporting the malicious nature of the file.

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 https://garglob.ru/uplcv?utm_term=what+is+a+plant+cell+like PDF link annotation
- https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/c8nn9ettvaqg4v5mv1cbevv4ps/devim.pdfIn PDF document text
- http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c088d8c46da---87184310498.pdfIn PDF document text
- https://amd-export.com/site/upload/file/92419487548.pdfIn PDF document text
- http://beymersan.org/upload/files/16445031988.pdfIn PDF document text
- http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721446680de---vonunemufefetumome.pdfIn PDF document text
- https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/hkr2ktrtd717numn03rr5bv0r0/69675195434.pdfIn PDF document text
- https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/05bf96aed283a8bf5380588a443c0ec5/sakewokudi.pdfIn PDF document text
- http://banghetretruc.com/media/ftp/file/78977865836.pdfIn PDF document text
- http://lamachine.nl/userfiles/file/wisagatobaropotu.pdfIn PDF document text
- http://asesorgubernamental.com/images/file/65901312668.pdfIn PDF document text
- http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/505evh6gee7qu45pak94oage72/tuboguz.pdfIn PDF document text
- https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/jdi9b1btpkv4qnnvuac2j4nj83/34205708445.pdfIn PDF document text
- http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160aca94feef98---tefewuru.pdfIn PDF document text
- https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f571ab9dbe---wovalazasugemera.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075469d07b58---zotimu.pdfIn PDF document text
- http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/be97097789e090566180be9a8d5e8395/19978129766.pdfIn PDF document text
- https://vildmarksjagt.dk/userfiles/file/91146193988.pdfIn PDF document text
- https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a32e78b4b90---81947261174.pdfIn PDF document text
- https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/88532a3b9d38db01fdf1a235fa7f52cc/fiwotepofogalobap.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b5e958385---wevupopupatojedazuwasax.pdfIn PDF document text
- http://artecgroupservices.com/imagenes/file/15181417910.pdfIn PDF document text
- https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b6f766cbc33f71b9085746aec1c36885/93133276761.pdfIn PDF document text
- https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/l4b9q94nhq0jc68775c5e1ft16/2432660612.pdfIn PDF document text
- http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d1c59e569---19122259896.pdfIn PDF document text
- https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/vvs7e0p4th2is86vjt1rob6au7/41402023038.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_off0000e388.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE388	17320 bytes
SHA-256: `133d61fe9a1e89db2aa8e2fa0f5b6bab95840408620a0f279585f05fec24a853`
`font_01_sfnt_off00010ffa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FFA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012811.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12811	10336 bytes
SHA-256: `ed75b9f1c1322340703808c4d5829b836da05ff8aa0c2e2efa3b5b807fe32ab3`

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