PDF malware analysis — malicious · 1f3fd0b5c507e961

MALICIOUS

PDF

117.4 KB Created: 2021-08-01 14:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 3ba1aba9984f5c9709b8370db1cb0781 SHA-1: 3c455e36f6ba6b40ff0f1a16cdad139a89fe79d2 SHA-256: 1f3fd0b5c507e961f67bb83d0bb8937149bde7452907b8a410090b7cd91d37d1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The document body is unreadable, but the heuristics and URLs suggest a phishing or redirection attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9863

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 http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16099c832a03c5---wazaxo.pdf In PDF document text
- https://ljlconst.com/admin/images/file/97365346396.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/6cff9144fa11323872e2e232bc91bde2/radakasanusufozavadi.pdfIn PDF document text
- http://farashimirooz.com/files/sisirinarafewitagolotilet.pdfIn PDF document text
- http://richwoods1969.com/clients/861079/File/lizuj.pdfIn PDF document text
- http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16086f4b662ecd---tofapimigovegasujinex.pdfIn PDF document text
- https://mecaniquekd.ca/upload/file/tapilebufudedofofafex.pdfIn PDF document text
- https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5011fa9ce1---96011315626.pdfIn PDF document text
- http://hainescentreasia.com/images/file/gelubezeruxanogoluge.pdfIn PDF document text
- https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/v52ja8rshgjrtk22ij3sgf3t16/fogenowetofukugov.pdfIn PDF document text
- https://33mobility.net/uploads/files/23806669399.pdfIn PDF document text
- https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/ava7uc7mksca93k0hjl2rlmf5a/51283262122.pdfIn PDF document text
- https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/4a0b217fc4924f384f7210211d62733a/75378901801.pdfIn PDF document text
- https://506hlapeta.com/files/file/xawetudebipoxefex.pdfIn PDF document text
- http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16076b24250e7a---winiviwerebegedujoduxejad.pdfIn PDF document text
- http://enewind.com/pliki/file/jaziginanitepagosodadit.pdfIn PDF document text
- http://cs-web-design.de/ablage/userfiles/files/69913962357.pdfIn PDF document text
- https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/1ec4b8f27b45efcdab5ede97ff665994/85254360740.pdfIn PDF document text
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccc067fdcc---vofubumibeno.pdfIn PDF document text
- https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/84a3b265f1d840d2806f0307a5df66e2/62908448504.pdfIn PDF document text
- https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075e731edfe9---38068003676.pdfIn PDF document text
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8685f0ceb2---jegorikomox.pdfIn PDF document text
- http://gld-lining.com/user_img/files/71295986614.pdfIn PDF document text
- https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/ce1285e8717fcdfa9ad8d3eb5e436029/77124974952.pdfIn PDF document text
- http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3fdc60fe0d---27721634692.pdfIn PDF document text
- https://hanedantoptan.com/upload/files/52791648636.pdfIn PDF document text
- https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948f5ecb7af---68500741962.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=examenes+ciencias+sociales+6+primaria+santillana+saber+hacer+pdfPDF 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_off000162ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x162AD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00017ac4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17AC4	11276 bytes
SHA-256: `ee674109fbd6825c1438144b54d50f680a440185da0d627a606b76886827aeac`
`font_02_sfnt_off000194ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x194CA	19108 bytes
SHA-256: `878c635a6c33ddb27853aac35d5c45bb458577e4376968ee709c37d5b5a931c0`

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