PDF malware analysis — malicious · 28c8238124c52194

MALICIOUS

PDF

85.9 KB Created: 2021-09-09 01:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 0423c1716205afd57f771e6fa359526e SHA-1: e3a0e182bb53bdc8971e02fe8d0b9cfc1ae3a548 SHA-256: 28c8238124c52194ae2734a7389ca384b4e4dfadbb60e988e9a585f9159aebb1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The presence of 'utm_term' parameters in some URLs indicates tracking for marketing or malicious campaigns. ClamAV detected this file as Pdf.Phishing.Trojan, and the ML classifier also flagged it as malicious with high confidence. No scripts were extracted, but the overall structure and URL distribution point towards a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

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 https://drafthe.ru/uplcv?utm_term=directx+12+update+windows+10+64+bit PDF link annotation
- http://kcntanduc.vn/img_duhoc/files/83644325659.pdfIn PDF document text
- http://halanmilk.com/upload/files/16341106793.pdfIn PDF document text
- https://chameleoncoupons.com/adgprocessing/uploads/files/zisijobaxuwem.pdfIn PDF document text
- http://glttek.com/userfiles/file/1578643676.pdfIn PDF document text
- https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/71080964687.pdfIn PDF document text
- http://abwrichmond.com/uploads/files/mofozivovogidopebidi.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135bd7712921---33205727624.pdfIn PDF document text
- https://ketex.com/trcgp/ckfinder/userfiles/files/87230013405.pdfIn PDF document text
- http://togul.org/sites/default/files/file/xinozufuxowijubim.pdfIn PDF document text
- http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16138d3db57a6c---1220146976.pdfIn PDF document text
- http://klm-co.ru/foto/ck/files/ropabibexuvitozomex.pdfIn PDF document text
- https://djecijagarderoba.me/userfiles/file/12094184851.pdfIn PDF document text
- http://byty-pardubice.eu/UserFiles/File/37810792826.pdfIn PDF document text
- http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613213211874b---7068181408.pdfIn PDF document text
- https://prestinireedcorp.com/userfiles/files/buvuwawad.pdfIn PDF document text
- http://heninrealty.com/userfiles/files/48182421321.pdfIn PDF document text
- https://discovercefalu.com/_data/images/file/xiwepawizopadigogulipipa.pdfIn PDF document text
- http://booklandbooks.com/userfiles/file/suvezofuwigokedosade.pdfIn PDF document text
- http://kimandyoo.com/userfiles/file/gaxanapaxakapokew.pdfIn PDF document text
- http://yao-cheng.com/uploadfiles/20210903112427.pdfIn PDF document text
- http://voszveszprem.hu/_user/file/beduxaxenir.pdfIn PDF document text
- http://catherine-massage.com/ckfinder/userfiles/files/15080148138.pdfIn PDF document text
- https://marjoyunlar.com/calisma2/files/uploads/34026971120.pdfIn PDF document text
- http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161393ac089345---vezavekupebax.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c691.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC691	11428 bytes
SHA-256: `f2d74e81aec31452fb4ba4b0a7ff81ff4f18c80daa1a337b930f8d15ed42e2b0`
`font_01_sfnt_off0000e1ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1AD	16232 bytes
SHA-256: `e06ebeaa2bb94d9bf14337b0794fec2c9c4a66e30291689b6f6234bfe360c8a5`
`font_02_sfnt_off0000f78c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF78C	21752 bytes
SHA-256: `aef11f6148faf328272ace195e7de26d852e85e43cce12bd2a8489ea4dee6648`
`font_03_sfnt_off00012f91.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F91	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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