PDF malware analysis — malicious · 96f58abc8714fbdf

MALICIOUS

PDF

91.5 KB Created: 2021-06-28 00:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 4c3c69cad2d3c3866bcbec2db7010255 SHA-1: a69df9b6f3600d4bd14ec4cdabb666ce62c746e4 SHA-256: 96f58abc8714fbdff52cfdf6939a96f03b3ca7204017b70bc03d6514050fb7db

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous external links, including one pointing to `smidgel.ru`, which are likely intended to redirect users to malicious websites. The presence of embedded URLs and the nature of the heuristics suggest this document is part of a phishing campaign, potentially using compromised CMS uploads to host further stages.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://smidgel.ru/uplcv?utm_term=military+gps+jammer PDF link annotation
- https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb5309d46a---47149263452.pdfIn PDF document text
- http://batiment-tunisie.com/userfiles/file/96702709681.pdfIn PDF document text
- https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/26d3d6877bcd41a7ba909d0edcf855dc/14411940125.pdfIn PDF document text
- http://refah4ter.info/basefile/hotelrefah4terir/files/59286966022.pdfIn PDF document text
- http://alpha-th.com/userfiles/file/beruvozumiwowomofaf.pdfIn PDF document text
- http://hieuchuan.com/upload/files/xugimiwemolajokim.pdfIn PDF document text
- https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/284b17cc69b044e944585780cf037c0f/biparojojadinuzaxaziz.pdfIn PDF document text
- https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/387e6e677e91583e7e19c17634542ad1/82356464736.pdfIn PDF document text
- https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/fb6bfe7c4d4b3800b5af70addf394d5e/66989031619.pdfIn PDF document text
- https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/84ce626dac26dea1b35c137495e7ea5b/72453619873.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d231149aae---44999844758.pdfIn PDF document text
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb234cb81c5---rekinotopetogitider.pdfIn PDF document text
- https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/4e8ca0c205fbf5867190cfe0393c967e/gelisumumafomupax.pdfIn PDF document text
- https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/d503cc85d0792add65add51902b827d1/79753653438.pdfIn PDF document text
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086c14fcdf7a---17970515394.pdfIn PDF document text
- https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090998f62a16---penugus.pdfIn PDF document text
- https://www.tunnel.de/files/uploaded/file/gixosus.pdfIn PDF document text
- http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16088e400d1977---vitizovemerodu.pdfIn PDF document text
- https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac28b6d26ea---77303127837.pdfIn PDF document text
- https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/b12r8svcl3pg2h3igerbnir0im/vegugidiwu.pdfIn PDF document text
- http://diysmart.net/userfiles/file/pifokoke.pdfIn PDF document text
- https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/fpn9adr0k0kfde1fh7jul5lbl6/ribisudavorukerak.pdfIn PDF document text
- http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1434bd2ba---49256831916.pdfIn PDF document text
- http://haenuri.net/ckupload/files/23581686515.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_off0000ffb6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFB6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000117cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117CD	10608 bytes
SHA-256: `0f097101276c7d64e756e47fc197b6857a6b2ebcbee1e31985302fc3331c9e9f`
`font_02_sfnt_off0001300a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1300A	18256 bytes
SHA-256: `d86360d909f32c9eccdfa9a537cd5eaf374945377ea1744d11edbb82ca3b134f`

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