PDF malware analysis — malicious · 0c7e8790afa8e02b

MALICIOUS

PDF

83.2 KB Created: 2021-07-28 14:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 1aa4fd5bee7c8742d9b9a387780b4f3b SHA-1: b436d6e00327cb938e3e4cbf27b03e657053c84d SHA-256: 0c7e8790afa8e02b467f900c49f5fb4b32bc5e5da3ddd38a93e719744c679486

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, directing users to multiple distinct hosts, many of which are compromised WordPress sites. The presence of embedded URLs and the PDF structure suggest an attempt to disguise malicious links within the document, likely to facilitate phishing or malware delivery.

Machine Learning

Nyx PDF Classifier suspicious score 0.4862

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 https://valenciamaids.com/userfiles/files/vabowibelexunapusa.pdf In PDF document text
- http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c309b269175---48149353374.pdfIn PDF document text
- https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3593aaf3d2---xedajegefekejudaxotidoka.pdfIn PDF document text
- http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45702c40e6---vaketizaraxolev.pdfIn PDF document text
- https://bio-obst-und-gemuese.de/userfiles/file/gufiwo.pdfIn PDF document text
- http://freehajjandumrah.com/admin/admin/uploadfiles/file/vituxasigala.pdfIn PDF document text
- http://kusadasidentalclinic.com/img/userfiles/files/68614093671.pdfIn PDF document text
- http://altinay-law.com/images/file/sikubudutupu.pdfIn PDF document text
- http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/nu6c6i4vjeiil2ddoik75ucnh6/75417782504.pdfIn PDF document text
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160b350b021485---5859800096.pdfIn PDF document text
- https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/r80ujad1rjor6bku767fmunbdv/xoparu.pdfIn PDF document text
- https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/55f61f47d002ba25ca22e50a40f03aec/nivekazogumemolej.pdfIn PDF document text
- http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a0c013a42---2613692668.pdfIn PDF document text
- https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/oh5is0prj3mp8vrd9l31v5u8k7/35329412989.pdfIn PDF document text
- https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/6cs2il5g001e4na1f7n99n0ch6/31534836016.pdfIn PDF document text
- https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/iiep7b682eepqq280vgmhssgbs/31642219081.pdfIn PDF document text
- http://eltonltd.ru/sites/default/files/uploads/80114403527.pdfIn PDF document text
- https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/55d95ccd51950bb5e02dab330dbd3529/bususosevubabegeku.pdfIn PDF document text
- https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/mltf0qr88474up4n68bht056ra/60504369593.pdfIn PDF document text
- http://aranykoronakft.hu/userfiles/file/wefarefoxuwutinitogiba.pdfIn PDF document text
- http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16076d14c8087d---5271947384.pdfIn PDF document text
- https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b93a0320605---35519955629.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=policia+puerto+rico+antecedentes+penalesPDF 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_off0000fa2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA2C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011243.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11243	10608 bytes
SHA-256: `47a6e60b0ce96520a29e29205740773ef172c0f7b6a238ab1efd6362f05dbbf6`

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