PDF malware analysis — malicious · 4162120739025b56

MALICIOUS

PDF

69.5 KB Created: 2021-09-05 17:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 8ac9d737543e168d0dc3cfe61cfc0be6 SHA-1: 15e0be2e1fa4d0e60b4bba880457b25fc28f3ad7 SHA-256: 4162120739025b56c30573a290587265631fd7903d86b8dbd4b2b74f2cfc66e6

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

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 WordPress sites and disposable domains. These links are likely intended to lure users into phishing scams or download further malicious content.

Machine Learning

Nyx PDF Classifier suspicious score 0.2573

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://archism.ru/uplcv?utm_term=dossie+superinteressante+crossfit+pdf PDF link annotation
- https://kibledergisi.net/resimler/files/niwuj.pdfIn PDF document text
- https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/901066610f8ce5d8f4ccd3fb61fa897a/mavujipapugenusotanina.pdfIn PDF document text
- http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093416345119---zekenisen.pdfIn PDF document text
- http://palenice.net/obrazky_clanky/file/gidimijipezabaxilif.pdfIn PDF document text
- http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788ead2c63f---rivonoba.pdfIn PDF document text
- http://jyotiacademicpress.org/uploads/file/wixovulujiz.pdfIn PDF document text
- https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/ec693bbd7dcd256bf36cc1e0dc63f545/5175362992.pdfIn PDF document text
- http://geometrarontani.it/userfiles/files/noxijiwiwipusu.pdfIn PDF document text
- https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/4eff2c5c7b60a0e0ca5c655ec2a88009/3047829789.pdfIn PDF document text
- https://master.plus/wp-content/plugins/super-forms/uploads/php/files/c9efe95bb50133daf8562f416fe813ba/51026995745.pdfIn PDF document text
- http://firegallery.ru/img/upload/sedad.pdfIn PDF document text
- http://axiomestates.com/userfiles/file/44783821195.pdfIn PDF document text
- http://ayhancevik.com/images_upload/files/kulireworiwilix.pdfIn PDF document text
- https://gogreenonline.net/userfiles/image/fckeditor/file/5657863961.pdfIn PDF document text
- http://sameiroeventos.pt/ficheiros/dapugejerobitefofili.pdfIn PDF document text
- http://gibisch.com/files/files/46033318284.pdfIn PDF document text
- http://ehomeforeclosure.org/images/file/76609844468.pdfIn PDF document text
- http://mamam.by/upload/File/file/58248702147.pdfIn PDF document text
- https://aedwea.com/upload/foto/29279393435.pdfIn PDF document text
- https://rafaellopezehijo.com/upload/files/40255085610.pdfIn PDF document text
- http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160e290062a922---57315856548.pdfIn PDF document text
- http://shinex-auto.com/userfiles/file/83079688339.pdfIn PDF document text
- http://yilbasipromosyonu.com/userfiles/file/52218822081.pdfIn PDF document text
- http://livestocktool.com/d/files/82572848558.pdfIn PDF document text
- http://roletyhanarol.pl/files/file/wogumuloxilolidi.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/a9c3ba44ab254513deff23ac6696a74f/tiwejoziw.pdfIn PDF document text
- 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_off0000c025.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC025	18408 bytes
SHA-256: `577962f0c01e41cb5a32e3a14aee3ce21af87131380c529bfcd759bb4475ed5c`
`font_01_sfnt_off0000f001.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF001	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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