PDF malware analysis — malicious · acf2bacc27e119f3

MALICIOUS

PDF

143.5 KB Created: 2021-07-08 05:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 7ca6529e519c40b41ff952d5860fe249 SHA-1: e35a97ed1d39a91a5022b0263f228fc6e24c0030 SHA-256: acf2bacc27e119f3e47541d34d688b856347fddfee4a322284cefc1258a78474

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 a large number of URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9761

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://chcial.ru/uplcv?utm_term=the+patriarchal+system PDF link annotation
- http://jessie.vn/images/ckeditor/files/nepewutupafexaxaxotinojom.pdfIn PDF document text
- https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160853f629c1f4---69309445671.pdfIn PDF document text
- https://aartipalette.com/userfiles/file/70128297500.pdfIn PDF document text
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85fb29510---30478248736.pdfIn PDF document text
- https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f35b6c2e2---26087180217.pdfIn PDF document text
- http://altiro.nl/home/tjerk/file/13904019261.pdfIn PDF document text
- http://randoquad72.fr/userfiles/file/wopelulekavulu.pdfIn PDF document text
- https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/8aa1116bb5305060951d09e7175b04c7/34338653475.pdfIn PDF document text
- http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b5f7a3a30---dejemofujosigivaxi.pdfIn PDF document text
- http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072ddf88592b---83059053062.pdfIn PDF document text
- http://richmore.kr/uploadfile/fckeditor/file/28941907331.pdfIn PDF document text
- https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/6f234a8d035929ca99ee96a88aef87f9/3496985059.pdfIn PDF document text
- https://fultoys.com/userfiles/jasorag.pdfIn PDF document text
- https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/0b1230c84365d78653fbd68cf97cee6a/jetadebozilasexux.pdfIn PDF document text
- http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f80cda786b---xoren.pdfIn PDF document text
- http://alituncer.com/userfiles/file/42912917508.pdfIn PDF document text
- http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607743c511abe---69534926859.pdfIn PDF document text
- https://ms01bet.net/contents//files/17720223865.pdfIn PDF document text
- http://kcde.kr/userfiles/file/xenowejakimiluxezotuwo.pdfIn PDF document text
- http://cerezolorente.com/files/cerezolorente/_repo/file/panuxegobifusujolux.pdfIn PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608312f7a3f51---87953099777.pdfIn PDF document text
- http://o2ashop.com/ckfinder/userfiles/files/zokunubebusa.pdfIn PDF document text
- https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/27c7d15f23f50b4596b32646c99dce5e/32919323859.pdfIn PDF document text
- https://www.passion-rnd.com/upfile/files/2021/06/10/papajaliwubuputivu.pdfIn PDF document text
- http://healthywithhart.com/res/file/sebusipep.pdfIn PDF document text
- https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/cf56d6cc9d290085a61eb6fd334fc6bb/setexiga.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_off0001bbd1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1BBD1	29144 bytes
SHA-256: `e75fda46c4f7058cc29924ff92c7c076cc37e185bde4f24238f0a854972a0e13`
`font_01_sfnt_off00020064.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x20064	10492 bytes
SHA-256: `3eabb9d15af98a29146fd4705f5759208aa2e68d826901295f8773e520e1b421`
`font_02_sfnt_off0002184f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2184F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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