PDF malware analysis — malicious · 912ce1c542a3a091

MALICIOUS

PDF

83.7 KB Created: 2021-07-20 01:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 70c3212dbecb4d1cc79782987f6c41e3 SHA-1: 06055ff8a21ed0fc5bf5466dbe3d48fe37c1d315 SHA-256: 912ce1c542a3a091b8d3a7923cacf00e667d86ce11afa891959fc38f0eb9fb8b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations. The primary attack pattern involves exploiting user trust through a deceptive document, likely a phishing attempt, to redirect them to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/59cb711b715061df91a1f5a043623d11/34381926319.pdf In PDF document text
- http://effektfilm.de/files/file/71941726053.pdfIn PDF document text
- https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/o6c8lu2c4q4l0ksjojggfqbkkn/10305463022.pdfIn PDF document text
- http://vattucongtrinh.com/userfiles/file/kugore.pdfIn PDF document text
- http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080bd6872db3---kikafowekiwoxebe.pdfIn PDF document text
- https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/fhs47c95130n81hp525ameqmg9/fixewowabijadaje.pdfIn PDF document text
- http://magogaralbamoble.com/galeria/files/49814974806.pdfIn PDF document text
- https://planet-for-events.de/userfiles/file/siwurukurugarilolujet.pdfIn PDF document text
- http://esistore.be/userfiles/file/pisuzolerenadulupokulusux.pdfIn PDF document text
- http://hosungtour.com/FileData/ckfinder/files/20210527_95A80D7CD62D5AD8.pdfIn PDF document text
- http://cristalensi.com/public/File/lerevilibelaminajapize.pdfIn PDF document text
- http://quickvideo.nl/userfiles/file/ranasurozizizirezujis.pdfIn PDF document text
- http://hotelamadeustorino.com/userfiles/files/73593013032.pdfIn PDF document text
- https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/076701d07728e89314fc01b768ef9eee/48100667181.pdfIn PDF document text
- https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/eea1ed8a68be8d32a9294385456f97c5/26531987395.pdfIn PDF document text
- http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cb956c17a---30278514834.pdfIn PDF document text
- http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d96602c4658---17223118411.pdfIn PDF document text
- http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dogifafusifizovugutebif.pdfIn PDF document text
- https://szekszardportal.hu/userfiles/file/piruzamedisezerun.pdfIn PDF document text
- http://belgium-ex.com/images/blog//file/66991274083.pdfIn PDF document text
- http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/1c75ec2fd58f5270aceeb24d7c31e041/29987697769.pdfIn PDF document text
- http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12c612596f---rofezuguk.pdfIn PDF document text
- https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/8ies51h2bpolhk3flo171lpg9q/fatigutumiwipeluzaxaga.pdfIn PDF document text
- https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/8732e83d0f8b8c2129fd59c72b35eead/93495192362.pdfIn PDF document text
- https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607615b73e311---zapijenukesufeb.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=return+of+the+footsoldierPDF link annotation
- 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_off0000e3a1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3A1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fbb8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBB8	10432 bytes
SHA-256: `e2e54f3a782ca92c39ec7402089cf359543552becb12d4a460f95659ed249952`
`font_02_sfnt_off00011341.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11341	17964 bytes
SHA-256: `e86f3e3e08564e11ab7664b3c585eb10fe8db71155850fc928a812805d521087`

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