PDF malware analysis — malicious · 0c16e2291dfacea2

MALICIOUS

PDF

78.6 KB Created: 2021-08-31 23:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16

MD5: 1d6044f21578c0166975c1421da23de9 SHA-1: 4a8b024773e6e1731272d8b5626398d1234d7858 SHA-256: 0c16e2291dfacea25d3835706275554d50e82f7b266a4e2dbeb5d29eab2906a9

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains embedded JavaScript and numerous external URIs pointing to compromised WordPress upload storage and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The embedded JavaScript likely facilitates the redirection or exploits vulnerabilities to execute further malicious code.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://wastran.ru/uplcv?utm_term=spin+selling+ppt PDF link annotation
- http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/94d1a7b3938257e126396a2ed1e76fa7/lusirenefukijawubofoxe.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e248c741e0---danijakewoligojisotigapa.pdfIn PDF document text
- https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9e0d15d15---6626326980.pdfIn PDF document text
- https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/92db0a2b471c7153d380ddc5da088499/junekewefidudugebemo.pdfIn PDF document text
- http://goldartline.ua/userfiles/file/wexuzesufowadavilelidijog.pdfIn PDF document text
- https://implant-drill.com/userfiles/file/zafite.pdfIn PDF document text
- http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d101856e1---lojosorekaronagas.pdfIn PDF document text
- http://akinmedical.com/uploads/file/30642887430.pdfIn PDF document text
- http://kartinatv.org/uploads/files/diwixoxubojijufomasa.pdfIn PDF document text
- http://abimobiliare.pl/pliki/File/52716105541.pdfIn PDF document text
- http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb87d534d2---88505905701.pdfIn PDF document text
- http://camionespanamericana.com/userfiles/file/51455462702.pdfIn PDF document text
- http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/nadexoxeferuge.pdfIn PDF document text
- https://bevillelecomte.ovh/ckfinder/userfiles/files/48787035498.pdfIn PDF document text
- http://paykaaluminiya.ru/ckfinder/userfiles/files/4516739415.pdfIn PDF document text
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cf6ddca7bcc---22439811569.pdfIn PDF document text
- https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/ce384e98ae1b49113dfbfdd0b1c64692/44038475501.pdfIn PDF document text
- http://travelsi.ru/ckfinder/userfiles/files/96079051239.pdfIn PDF document text
- http://beiwendq.com//data/attachment/file/63070181259.pdfIn PDF document text
- http://www.mamafoundation.cz/ckfinder/userfiles/files/gokorotutitevemunikeb.pdfIn PDF document text
- https://relaxbotanika.cz/ckfinder/userfiles/files/75103055906.pdfIn PDF document text
- http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f73547a2e---18467377526.pdfIn PDF document text
- http://mmprogetti.it/userfiles/files/77311022453.pdfIn PDF document text
- http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16094d8eda840f---5076208647.pdfIn PDF document text
- 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_off0000d12d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD12D	16992 bytes
SHA-256: `735071d211af958c093ae2c725b37a17f29c494114cffb7fb658d082c5acf9be`
`font_01_sfnt_off0000fcab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCAB	10120 bytes
SHA-256: `6c1e73a86af52416c4eb2ac8b24132c4b2267ce81be403ca5aecbbb625a36193`
`font_02_sfnt_off0001135d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1135D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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