PDF malware analysis — malicious · 2d3d82e398ec5f2e

MALICIOUS

PDF

88.9 KB Created: 2021-06-26 23:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 7b92f8022f824b87af81e10c7e571f32 SHA-1: f31f7a6634c48c8fd9d7bbfe2c5acdb5a5ee37c6 SHA-256: 2d3d82e398ec5f2ee88a378474b65a764797f0c54dbd27778afd90ae6fb1f5ed

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and link farm indicate it's designed to redirect users to potentially harmful external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/c14036b168b2fbf74333c04ef1a72ae6/95054454443.pdf In PDF document text
- http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3675a2043---ralutadajibagipodux.pdfIn PDF document text
- http://gloucesterclassof81.com/clients/23558/File/18049280188.pdfIn PDF document text
- https://lescourailleurs.com/upload/editor/file/25024767924.pdfIn PDF document text
- http://ytovietnam.net/ckfinder/userfiles/files/tenud.pdfIn PDF document text
- http://ytovietnam.net/ckfinder/userfiles/files/vosuwibebofudemededofetam.pdfIn PDF document text
- http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/83adcb185f8702a2294675cf2846cae2/kenojir.pdfIn PDF document text
- https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f2ac6d0d3---26789624614.pdfIn PDF document text
- https://aimhc.com/userfiles/file/54839649283.pdfIn PDF document text
- http://eatatrudy.com/uploads/files/10849230052.pdfIn PDF document text
- http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16076375b2dfe9---wunefovosuserukuw.pdfIn PDF document text
- https://terryhaas.com/wp-content/plugins/super-forms/uploads/php/files/5f43348ad7b49a60204fa5f02c564dab/toraweworamilesuvenaxe.pdfIn PDF document text
- https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/b0f1e4cfc0fc60242c700cde446a0996/23603813396.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/g30qqj0mpfd96rrfcgs1fcl1nv/25507720007.pdfIn PDF document text
- https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/055758878cc2cf1cd651d9efea6c7bff/logubojirufobefikopil.pdfIn PDF document text
- http://kameleonhastanc.hu/files/file/533063596.pdfIn PDF document text
- http://fitsiluet.cz/data/file/sozep.pdfIn PDF document text
- https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/8ef8697efe3860574210004987aea123/givezegokuxazezolikar.pdfIn PDF document text
- http://hungbuloon.com/media/ftp/file/serebonipaxemopajozi.pdfIn PDF document text
- http://psychologkmalinowska.pl/ckfinder/userfiles/files/kigodexemetebawagajimib.pdfIn PDF document text
- https://aashianarealty.com/file/zeremuzubodelogep.pdfIn PDF document text
- http://teifsepahan.com/files/file/90017392542.pdfIn PDF document text
- http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0b7fda248bda2a04cc7ddc544fd3d6b6/66326389280.pdfIn PDF document text
- http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b19857c15---pepuratidawigugebis.pdfIn PDF document text
- http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c008b7e1130---getibulisuwetuzoni.pdfIn PDF document text
- https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/c81463df99f6ddafd1aceac271cd1e21/vunikonepotuzu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=spanish+for+17PDF 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_off0000f5fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5FE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010e15.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E15	10356 bytes
SHA-256: `0e7ae2eadca0a8d17022d817bf76fdb44ab7d43266db47364175afeeb2e4af23`
`font_02_sfnt_off0001256f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1256F	19112 bytes
SHA-256: `799b20dee0b20194215d2b8235a6963060b3a1ea14bcc7fe890d1c95214ceeee`

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