PDF malware analysis — malicious · 3c1f77ad6d3dc69c

MALICIOUS

PDF

81.4 KB Created: 2021-08-26 09:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: ab4d4eea5e21bfcdbf81a539869372c9 SHA-1: ae54b347b79aa0bc7ed6be0a700ba58b39df694f SHA-256: 3c1f77ad6d3dc69c68418f965d4ec402fc8a7bda00f940854fd94a2ac9dd7eaf

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to lure users into downloading further malicious content. The PDF structure and embedded URLs suggest an attempt to disguise malicious links as legitimate content, a common phishing tactic.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://www.darvidproperty.com/news/file/meneg.pdf In PDF document text
- http://stylekd.ru/files/wudapelalaniwituzelub.pdfIn PDF document text
- https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/tfffv8hf2cftkvhar0hpnkph7a/10697982726.pdfIn PDF document text
- http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2775a7b6---movunejetofuwenupame.pdfIn PDF document text
- http://lokalsport.no/userfiles/file/gopenarajapogimexonevonu.pdfIn PDF document text
- http://gelikonline.ru/content/Files/burogokipeb.pdfIn PDF document text
- https://geneolock.com/locktactyuma/userfiles/file/38588600534.pdfIn PDF document text
- http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16126ba92e9912---44615102906.pdfIn PDF document text
- https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/a2eeb7ea1e647fb5f6ba15b0728a6167/9326133303.pdfIn PDF document text
- http://dgjst.com/upfile/file/96665534813.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1ccf081bc---rumifusezewevex.pdfIn PDF document text
- https://afmiletisim.com/resimler/files/21657267709.pdfIn PDF document text
- http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/xunemalevirotalasobevalo.pdfIn PDF document text
- http://assushop.com/userfiles/assushop.com/file/3082185910.pdfIn PDF document text
- http://creaorganization.com/depo/sayfaresim/file/50537416481.pdfIn PDF document text
- http://lhsclassof68.com/clients/73441/File/42717167956.pdfIn PDF document text
- http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7c0aaf529---93523763541.pdfIn PDF document text
- http://zhengfutz.com/v15/Upload/file/2021821914594712.pdfIn PDF document text
- https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd58a9ac07---59461168673.pdfIn PDF document text
- http://jnafarms.com/clients/864068/File/manubiki.pdfIn PDF document text
- http://relaxzenter.com/uploads/files/xozefis.pdfIn PDF document text
- https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9cbe7514f---11326543847.pdfIn PDF document text
- https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/819ba3cq4f8l7go4et85ls97oo/waguxutunuxevovugu.pdfIn PDF document text
- http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c274784fc59---81337517948.pdfIn PDF document text
- https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/3cpsk4fq5hkbc8tsat0igbcnlu/besawisas.pdfIn PDF document text
- http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/3365762925.pdfIn PDF document text
- http://xn--k1akb4c.xn--p1ai/userfiles/file/duwisezepero.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=mgt+by+exceptionPDF 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_off0000ddf1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDF1	16472 bytes
SHA-256: `a2b9d84e19ddd8e784c3e0e74381eec85d2164c2ea2e00e2bfc7ac352dc6e6b7`
`font_01_sfnt_off000108b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108B9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000120d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120D0	10424 bytes
SHA-256: `a472a281a5563c7530d27b23695f8dc1e95264d7ebf22cb2e438ed1fb2d79b37`

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