PDF malware analysis — malicious · 45b32ad29c4c701a

MALICIOUS

PDF

75.3 KB Created: 2021-09-02 21:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 800f294e394339aa0cee48b48226265a SHA-1: b1fd40c548dc1f4e0598ff5d5b70093ff1de1228 SHA-256: 45b32ad29c4c701a8ea8abbcfcc8a5e3774ae1c0fe5c60bd297f8d2f21c5a96c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or further malware downloads. The presence of external URIs and compromised CMS upload links suggests a distribution mechanism designed to lure users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9948

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://oniceh.ru/uplcv?utm_term=basic+trigonometry+worksheets+pdf PDF link annotation
- https://guijek.com/userfiles/file/16875446114.pdfIn PDF document text
- https://mobiligennari.com/userfiles/file/82771593649.pdfIn PDF document text
- https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/00fu3b9fr9b3jk3pv2dfpqaje3/21601056113.pdfIn PDF document text
- http://originalavto.ru/userfiles/file/zebatutesotujidojulu.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/llsiugnnr609vv87ns7frffjid/7864152437.pdfIn PDF document text
- https://aglogistics-bo.net/userfiles/file/3005549010.pdfIn PDF document text
- https://bandotrading.it/uploads/file/sawaforovegunejanavus.pdfIn PDF document text
- http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/1002156376.pdfIn PDF document text
- https://csn-alliance.com/data/files/21701788579.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/tnmbrsu85jto5ridpshtp1lbdg/wesefomopawero.pdfIn PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8b247e71c---dikidetafududexuvan.pdfIn PDF document text
- https://vntdc.com/upload/fck/file/13682091830.pdfIn PDF document text
- https://usdcp.jp/user_data/userfiles/files/62889725942.pdfIn PDF document text
- http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/menevifezopoxi.pdfIn PDF document text
- https://alice-immo.com/userfiles/file/jepufapilenezesulilupej.pdfIn PDF document text
- https://kurishupally.org/userfiles/file/22922047355.pdfIn PDF document text
- http://7tec.ru/userfiles/files/83520653049.pdfIn PDF document text
- http://chromavials.com/d/files/90500388184.pdfIn PDF document text
- https://emmaushuis.org/pages/fekomemaxisuj.pdfIn PDF document text
- http://savitapiti.org/ckfinder/userfiles/files/gobugenokomokuv.pdfIn PDF document text
- https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/fivexepij.pdfIn PDF document text
- https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/9ojs15e83no1ecl8lplih1765h/76581974458.pdfIn PDF document text
- http://englandmatchshirts.com/assets/file/sudofitobivuvasukomelu.pdfIn PDF document text
- http://webbuilders.com/files/file/90075151304.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_off0000c2cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC2CF	16680 bytes
SHA-256: `e048ad1e568e31be00526cb540f1519aea727cfb91f20b30f9b35230e8f008ae`
`font_01_sfnt_off0000ed59.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED59	11364 bytes
SHA-256: `896033639a79a9299e1015e9f1eee50b46a066a170a55b88a3c53a03834fd185`
`font_02_sfnt_off000107e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107E1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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