PDF malware analysis — malicious · af556528d051b6b2

MALICIOUS

PDF

85.9 KB Created: 2021-06-27 21:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27

MD5: 7705ec866d8c14861efb14b5e4ca209c SHA-1: 48ccd71c24b7c8449b77e297cd994565517b159f SHA-256: af556528d051b6b24c4141a00bc1cdddf99a2cc053e3ffe9c9932c7733aafd90

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate it functions as a link farm, hosting numerous PDF files on compromised WordPress sites. These links likely lead to phishing pages or further malware downloads, aiming to deceive users into clicking them.

Machine Learning

Nyx PDF Classifier suspicious score 0.3632

Heuristics 5

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
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://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf6319732---60056468186.pdf In PDF document text
- https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4ac5e7877---baruvuw.pdfIn PDF document text
- https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c36479634---95246823539.pdfIn PDF document text
- http://cnc-soustruzeni.cz/files/file/63591244811.pdfIn PDF document text
- https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/0622f3563284736cbe91ab1fabb5708c/vumudi.pdfIn PDF document text
- https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088cf517c78d---fuzadobinig.pdfIn PDF document text
- http://gwhs79.com/clients/867100/File/22792321021.pdfIn PDF document text
- https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/cc97b93cbbbc55805f5a2d6043396d84/93264941240.pdfIn PDF document text
- http://jjmcp.jp/userfiles/Image/file/65313900348.pdfIn PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729fc6b4207---vesitokolonozefigamutufu.pdfIn PDF document text
- https://cambodiadriverservice.com/userfiles/file/wekewefupetosa.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609439350c097---zaxekovuxijumovenagoburol.pdfIn PDF document text
- https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160942efb731cb---31285148722.pdfIn PDF document text
- https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160997f041f59a---91498594116.pdfIn PDF document text
- https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb9566fbfe---56465560180.pdfIn PDF document text
- http://beiwendq.com//data/attachment/file/gemopisetonilubezizawol.pdfIn PDF document text
- http://amctop.com/board_data/editor_img/file/202105121006.pdfIn PDF document text
- http://cravaluos.com/ckfinder/userfiles/files/78293173678.pdfIn PDF document text
- https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/pcp74ao8ogv48bdn0f6tktsv0d/ziwugakeworipiborozeruf.pdfIn PDF document text
- http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080655852964---dozotusumezeto.pdfIn PDF document text
- http://africa-emergence2019.com/userfiles/file/84963416287.pdfIn PDF document text
- https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3be8094e51---nudavuwobijasarufigeves.pdfIn PDF document text
- http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/85204398168.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=the+number+devil+activitiesPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010644.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10644	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011e5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E5B	10784 bytes
SHA-256: `fe6bb3aebf9cddad68c056634f1f6913d93f125c4e0c82ec05ad6b19ccdc43a4`

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