PDF malware analysis — malicious · faa6e5fdaa9c48a6

MALICIOUS

PDF

75.6 KB Created: 2021-09-17 02:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: 5e4690523645e6292a50f0a01283d554 SHA-1: aae260940b4abe308942f61cb299c7c692c16269 SHA-256: faa6e5fdaa9c48a6a6ac4578f3198ac69ba9f2c29293d60ee49689595d3ef93d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9827

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://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/4f754f2ebac5fa542811661fe61bb890/78809654888.pdf In PDF document text
- https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/f3qsahtruirna8719c72cs7iks/vopinonizonidakikod.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/jevomuraz.pdfIn PDF document text
- http://manchetenewsms.com.br/ckfinder/userfiles/files/petosotiwanazo.pdfIn PDF document text
- http://suaups.net/userfiles/file/64203836870.pdfIn PDF document text
- http://vit-physio.de/file/danaxotaza.pdfIn PDF document text
- http://effekt-film.de/files/file/jelaxuxef.pdfIn PDF document text
- https://psihodesk.ro/ckfinder/userfiles/files/7022510298.pdfIn PDF document text
- https://tranhtreo.com/images/ckeditor/files/wawelotudekibuj.pdfIn PDF document text
- https://bywuf.org/upload/editor/files/6857117017.pdfIn PDF document text
- https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/3558d4c6c229aa8be35d9592aef2814b/88043474206.pdfIn PDF document text
- https://siriusdynamics.com/assets/uploads/files/5161546199.pdfIn PDF document text
- https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/wozutevu.pdfIn PDF document text
- http://edv-denk.com/userfiles/file/70202232027.pdfIn PDF document text
- http://saovietgroup.com/upload/FCK/file/32900428725.pdfIn PDF document text
- http://msdoubrava.cz/foto/images/file/97643512560.pdfIn PDF document text
- http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/numasabe.pdfIn PDF document text
- http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/37498689888.pdfIn PDF document text
- http://quatangsongvan.com/hinhanh_fckeditor/file/51002669777.pdfIn PDF document text
- http://caudafotografia.com/userfiles/files/luwanoxepibefusom.pdfIn PDF document text
- http://blossomtour.net/FileData/ckfinder/files/20210915_1F8A406C7CEC6517.pdfIn PDF document text
- https://autosaloncenter.com/uploads/files/56467019250.pdfIn PDF document text
- https://ebooksweb.net/files/file/98490085274.pdfIn PDF document text
- http://adhunikjewellers.com/ckfinder/userfiles/files/fonavisum.pdfIn PDF document text
- https://myclubowners.travelenvogue.com/userfiles/files/pezajixovabube.pdfIn PDF document text
- http://elitvorota.ru/f/file/93221263406.pdfIn PDF document text
- http://snp-ent.com/files/fckeditor/file/1554753726131f43d0129a.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=cheat+codes+for+pokemon+emerald+master+ballPDF 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_off0000c007.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC007	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d81e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD81E	11056 bytes
SHA-256: `24ecaa479b41564a2eaa3970a3e08b9d3176f5b68e8155d6eca6bdb6330664b5`
`font_02_sfnt_off0000f17c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF17C	17996 bytes
SHA-256: `3947a60fb20e0ccc7c95f39d4dee33baacdacd5ee84c0a039c516ee5195349a9`

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