PDF malware analysis — malicious · 6e6c2a5936efed40

MALICIOUS

PDF

71.7 KB Created: 2021-09-04 03:34:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 35d9445cf20ee9392d5524d4b4bb8728 SHA-1: 011b9797361004ab761f63adb089423ffd41be88 SHA-256: 6e6c2a5936efed40c82ab8bd5b24b5c350a6d0de4b76b4d4021f38f9c484c5cd

124 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, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into downloading further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, further suggesting malicious intent.

Machine Learning

Nyx PDF Classifier suspicious score 0.4270

Heuristics 5

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
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 http://zxsolar.com/d/files/lajodurikesulimubozipema.pdf In PDF document text
- http://resortvillairene.it/userfiles/files/58602257618.pdfIn PDF document text
- http://ulleungroadtour.com/FileData/ckfinder/files/20210708_5FD550DFE1FAD2F0.pdfIn PDF document text
- https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/85fcf2070d3f58166ccd5f5f6d0ef64a/koduxudazowagijoxitivesa.pdfIn PDF document text
- https://laserbeautymachine.net/d/files/bivapomegudiwako.pdfIn PDF document text
- http://studiotecniconuti.it/userfiles/files/lifotomododogoxonazodu.pdfIn PDF document text
- http://protectakoteasia.com/ckfinder/userfiles/files/90431764576.pdfIn PDF document text
- http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869c373a19c---kirovufu.pdfIn PDF document text
- http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eec28cff68---11078201845.pdfIn PDF document text
- https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160be96654607f---36284819767.pdfIn PDF document text
- http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ramknfuj00t464cfqee1ffs9v7/lafaxaj.pdfIn PDF document text
- http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fe0b552bb---gosut.pdfIn PDF document text
- http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1606f50a4a5f2f---kekojipetaresogim.pdfIn PDF document text
- https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cd3fbce1ba9---98529769050.pdfIn PDF document text
- http://cngwalk.com/fckeditor/userfiles/image/73560272460.pdfIn PDF document text
- http://lindseyderence.com/userfiles/files/naporetal.pdfIn PDF document text
- http://zzweien.com/d/files/44832429561.pdfIn PDF document text
- http://bestapp4u.com/admin/uploadedfiles/file/sisazaselatuw.pdfIn PDF document text
- https://betentour.com/sites/default/files/file/65911568081.pdfIn PDF document text
- http://ankaser.com/userfiles/file/jafukulonifizokubesore.pdfIn PDF document text
- https://habibitours.net/ckfinder/userfiles/files/13427857120.pdfIn PDF document text
- https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/ea33853c402cebca81d49ddb61e4ec0c/17088671349.pdfIn PDF document text
- https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad839bf845---99789496184.pdfIn PDF document text
- http://txextremecarts.com/userfiles/file/joxolezikemoko.pdfIn PDF document text
- http://speckrepej.com/upload/file/47884761157.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=gilson+pipetman+m+manualPDF 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_off0000d4ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4EA	10452 bytes
SHA-256: `863e082e218482dbdef272c5540ceba054e2324c9a777130ffd6074162e026a3`
`font_01_sfnt_off0000eca8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECA8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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