PDF malware analysis — malicious · 3175a6e67ef7cba5

MALICIOUS

PDF

84.9 KB Created: 2021-09-01 12:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 4c0c205660de6cff1c44628cd1f8b0b3 SHA-1: bdedbb430a4597246e2298bca3d5f2f161c6fae7 SHA-256: 3175a6e67ef7cba53bfbc342f44dc068b1ccad588dfe5255af71ada027d88b10

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to potentially malicious content. The presence of these links and the compromised hosting indicates a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9934

Heuristics 6

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
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://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/2b3ad1bcd5cc62d3e45726b752617689/duvatitarel.pdf In PDF document text
- http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/8519515254.pdfIn PDF document text
- https://daks-96.com/f/uploads/files/monuriduduxasuparaj.pdfIn PDF document text
- https://balajihighfields.in/userfiles/file/76617127195.pdfIn PDF document text
- http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38ac3f0432---rudasufepagokotirikalubi.pdfIn PDF document text
- http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079ab30ed6f0---23272068476.pdfIn PDF document text
- https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/eff735818bb4a659ba5e5e793aae8ae5/tixol.pdfIn PDF document text
- http://princeworldwide.com/multimedia/userfiles/file/tegutovi.pdfIn PDF document text
- http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jasobese.pdfIn PDF document text
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160afa19473855---sogewowazisadimubojat.pdfIn PDF document text
- http://ateliergermain.net/sites/default/files/file/4052351963.pdfIn PDF document text
- http://pnktools-th.org/ckfinder/userfiles/files/27683645275.pdfIn PDF document text
- http://ebanksunited.com/clients/7/7d/7da19d52c1086e69e61582739ce98a0f/File/sinenugexadaxovemuzujuvet.pdfIn PDF document text
- http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32491027268.pdfIn PDF document text
- https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a349cd53402---51158039460.pdfIn PDF document text
- https://chris-arnold.com/userfiles/file/18433574051.pdfIn PDF document text
- http://bindashnews.com/userfiles/file/zabexaxo.pdfIn PDF document text
- https://uppersanduskyrotary.com/cms/files/File/xewokebofare.pdfIn PDF document text
- https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943ed4c8939---28949147718.pdfIn PDF document text
- http://mega.kz/media/upload/files/nujemuwevepojuba.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16090173651fff---30603315770.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608784f805670---palarozagitimovofiwes.pdfIn PDF document text
- http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4b37807e3---momakinuwat.pdfIn PDF document text
- http://cokhihoaiduc.com/uploads/files/17028233633.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d1ec0f4e5---niwujasixaloridozutikad.pdfIn PDF document text
- http://superfishinglewood.com/uploads/files/80924017687.pdfIn PDF document text
- https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/13cd195465d2923fdd925d03bd22c0fd/3239108627.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+many+calories+is+in+a+sausage+egg+mcmuffinPDF 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_off0000e74a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE74A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ff5c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF5C	17244 bytes
SHA-256: `ada0b52f8b5340967fcaf9f0d2e5cba3e3a4027682cff6e2a8d5aeba15d75919`
`font_02_sfnt_off00012bd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BD9	10872 bytes
SHA-256: `c9af26c22b53ab9ff3eb5b33dd9c888f4814aca188b5962ed2da547c021f1af4`

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