PDF malware analysis — malicious · 37cb5779d2c10c5f

MALICIOUS

PDF

87.5 KB Created: 2021-08-06 08:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 4d8a97472b78ef146e5ca576cc9ed30b SHA-1: 97d7d1383f1564796a3bacadc4546c1bec39db6d SHA-256: 37cb5779d2c10c5f3b4add768851d9589f41deb4d4d8c29d4e00bb59ecea6141

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://inwebjor.ru/uplcv?utm_term=que+significa+cuando+te+duele+el+vientre+y+la+espalda PDF link annotation
- http://aite-materials.com/upfiles/file/varimalejanaxepanaro.pdfIn PDF document text
- http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15552919327.pdfIn PDF document text
- https://sunnyrosesschool.com/userfiles/file/derulo.pdfIn PDF document text
- http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16086668c60609---xujokoxiganodaresezor.pdfIn PDF document text
- http://cnhhgj.com/upfiles/userfiles/file/17888100961.pdfIn PDF document text
- http://begemot-rus.com/uploadfiles/file/2021052223484573499.pdfIn PDF document text
- http://silesiacapital.eu/data/file/muvejekodijod.pdfIn PDF document text
- http://desagresbrts.com/clients/34568/File/xibobate.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2ee3c8c51---68978478116.pdfIn PDF document text
- https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/4bec4290de4413484be032e1f8e42f15/lajiwototulexunixi.pdfIn PDF document text
- http://adabaskimerkezi.com/upload/file/58522011894.pdfIn PDF document text
- https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/cc225de0bda8a20e9faaee20653554cd/99621915464.pdfIn PDF document text
- https://zapcdn.space/web/img/podborky/files/13720294419.pdfIn PDF document text
- https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/ae528b563f841f56ee0cffc60ef18395/89930374435.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/tmhucjh6omdgr4ltvjduhbkgvp/vofugamalafupojoku.pdfIn PDF document text
- https://standsimulator.com/ckfinder/userfiles/files/89520630400.pdfIn PDF document text
- https://linker.tw/files/suweguwowozuxojibebi.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee10859bdc---41522876443.pdfIn PDF document text
- https://pianoinprimopianofestival.com/uploads/file/79681464407.pdfIn PDF document text
- http://www.derbysignandgraphics.com/uploads/file/81801918490.pdfIn PDF document text
- https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/4fa0f98da244846808b4e7c8dab93028/vamemalipemi.pdfIn PDF document text
- http://grandp.ru/userfiles/file/jugakinoweropiromul.pdfIn PDF document text
- https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/89443da296c1f6512b23959d6233b2e5/bixumafufabedevew.pdfIn PDF document text
- https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/4e08baad43abb8b09c4f21717c75f428/rekodoxedaf.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_off0000eda5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDA5	18076 bytes
SHA-256: `a30706881bc9db6bfe869d3a97ca41c59099b0017ca6b28de092cd8a3efb820d`
`font_01_sfnt_off00011bf1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BF1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013408.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13408	11136 bytes
SHA-256: `fa7701134808c66a5eee3fe821e37195355096bb1df82a82d230302ac2354a24`

Open this report in the interactive analyzer, or submit your own file for analysis.