PDF malware analysis — malicious · 4fa4710193162828

MALICIOUS

PDF

89.4 KB Created: 2021-07-03 14:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 8aca6f0a4639b769015cfab03a3b8e1e SHA-1: 024b3bcfdff1d5b1045b3bd4cbe1056c302bc385 SHA-256: 4fa4710193162828cc6d71b1429db9c0b67fd80ac60d0d34a63d279ed8aae142

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting. These links likely serve to redirect users to malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7b580d2db---44727174119.pdf In PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6bb0d369b---xuzazogenupikofapine.pdfIn PDF document text
- https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5a6b8a0bb---dulijerafinawulekapasobe.pdfIn PDF document text
- http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1446e5a16f---kimeguwabaxawiwarenato.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/6efe91cba3f3903acb90d537ba307822/zupemufafibapugasar.pdfIn PDF document text
- https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c240ed0c0d---ruzefebamidaru.pdfIn PDF document text
- http://3e-recycling.ru/app/webroot/filesfiles/guwedimewojogemukav.pdfIn PDF document text
- https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/0ed4960cd6fba96a05472243a8e662a4/11331964142.pdfIn PDF document text
- https://rajatotogroup1.com/contents//files/84342114847.pdfIn PDF document text
- http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6dc96d12f---8399092451.pdfIn PDF document text
- http://innovatepc.com/userfiles/file/30603180569.pdfIn PDF document text
- http://srividyaastrology.com/userfiles/file/soxezafepezetevem.pdfIn PDF document text
- http://aivieksteslaivas.lv/userfiles/file/10280935758.pdfIn PDF document text
- https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/77361838897.pdfIn PDF document text
- http://nicenpos.com/userData/board/file/xulesufo.pdfIn PDF document text
- http://www.vikingmaterials.com/img/47319148560.pdfIn PDF document text
- https://hogies.com/includes/template/uploads/file/zujekegemisar.pdfIn PDF document text
- https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/cb3dc84322383320d397635e5060e09e/nowusunasefanolotapegaj.pdfIn PDF document text
- http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093246abe769---45834184985.pdfIn PDF document text
- https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c23fdb131d7---10763562185.pdfIn PDF document text
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/1031ca45205b6670a3f1ce76efd44aa1/durowanutisazamenidomeva.pdfIn PDF document text
- https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607009808fb12---24910726225.pdfIn PDF document text
- https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723ddadcb0e---jaxemadilewavapinuzasidif.pdfIn PDF document text
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/u2b4r115kd55o1ti01cb1jvp1o/vinikifisenojerone.pdfIn PDF document text
- https://kede.org/userfiles/file/xetuvatotinitawugonina.pdfIn PDF document text
- http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f31c7916207cb87a9e8818e40c7b4aa7/zuluribolubatebet.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=collocation+meaning+in+malayalamPDF 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_off0000f466.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF466	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010c78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C78	19140 bytes
SHA-256: `07e40414778c11605a75afebab8faed91132a2a5e0ccb4ffe83a28afeeb90d02`
`font_02_sfnt_off00013ece.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13ECE	10452 bytes
SHA-256: `a3de4490d869865a6d77b4c25da6c068600f5efb8f14c5056adbcd4323c8a67f`

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