PDF malware analysis — malicious · fdf15062374c1b98

MALICIOUS

PDF

83.0 KB Created: 2021-07-23 10:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: c026a7ef5fd299a246316bf7a48f9d96 SHA-1: aa8319e5bd4a57c1ff906c6ea4713a274ce3e12b SHA-256: fdf15062374c1b980c50f4a42a727eb1e7f1d1355b788818eec90d5f74fe5e9d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute malicious content. No scripts were extracted, but the structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16092a98e3f336---sojuduzujis.pdf In PDF document text
- http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c564249ccaf---dekufevomopaje.pdfIn PDF document text
- http://viprealestatebrokers.com/userfiles/files/7572739362.pdfIn PDF document text
- http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16083b23febea7---somiwakofoxizuberesax.pdfIn PDF document text
- http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca75d8e6b---94192565031.pdfIn PDF document text
- http://scuderieverdina.it/scuderia/userfiles/file/74093630798.pdfIn PDF document text
- https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/7b28ba1b2e54963bc7987853c68b6da6/1139212434.pdfIn PDF document text
- https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/ed7795dc23a15e2591e4e8b2dfe09ad2/napidob.pdfIn PDF document text
- https://wodepcb.cn/uploadfiles/files/62193411867.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c2598ae93---34728765750.pdfIn PDF document text
- http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d247f86a5f8---94951270731.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088966c924aa---vutirilafom.pdfIn PDF document text
- https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b29cc613b5f---purala.pdfIn PDF document text
- http://yuanyoujie.vip/userfiles/file/43659312780.pdfIn PDF document text
- https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071030e21b5a---40486107015.pdfIn PDF document text
- https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/cfe035cce986e298417907ffe6abfdba/rugodukosadunopunezabe.pdfIn PDF document text
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888e9f3aeb9---59704185266.pdfIn PDF document text
- https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/5c207a015a052e04ddec033dbe323a26/4516837480.pdfIn PDF document text
- https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/88d0f2cff54f7ede384e646352f7bcbc/bidizefimovebukovebo.pdfIn PDF document text
- https://hglobaltourb2c.com/FileData/ckfinder/files/20210610_F78593327D3A54FA.pdfIn PDF document text
- http://hotararicedo.ro/files/files/sozegu.pdfIn PDF document text
- http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fa119f3e57e---nufikak.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=lab+and+diagnostic+testsPDF link annotation
- http://s292376414.onlinehome.fr/datas/imgmail/file/detaxinofired.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_off0000e143.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE143	17316 bytes
SHA-256: `58121cba8912e2826c70cbb5dd26a35d1ca118bc472717828126bfea4607b328`
`font_01_sfnt_off00010e6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E6E	10496 bytes
SHA-256: `2bd05dce694aa73fb80f2b7c1a572c2dde2107ec477f3818d0790c7cfb9325a8`
`font_02_sfnt_off0001263f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1263F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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