PDF malware analysis — malicious · 91296372e3f6f689

MALICIOUS

PDF

95.7 KB Created: 2021-07-09 08:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 8b415df067b3dc4dd1175f432cee4fe3 SHA-1: 755a5a25eba5b26f3e0d54036f5f648d60a30648 SHA-256: 91296372e3f6f689fd4bfffd635ba09fff17957cf3ba05495fc4d847a345385e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of external URI redirects and compromised CMS upload links indicates a pattern of redirecting users to potentially harmful destinations.

Machine Learning

Nyx PDF Classifier malicious score 0.9929

Heuristics 6

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
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://philabc.ru/uplcv?utm_term=alliteration+in+beowulf PDF link annotation
- https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fed6abd05---jodelezejivip.pdfIn PDF document text
- https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1b370bf79---woporodigoti.pdfIn PDF document text
- http://rolmech-strzelno.pl/Upload/file/84805863585.pdfIn PDF document text
- http://apexnepaltravel.com/userfiles/file/meravononevuzorimibat.pdfIn PDF document text
- https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//vedotekuzogubadidak.pdfIn PDF document text
- http://canxetaianhduc.com/images/file/63769546701.pdfIn PDF document text
- http://industrialdevices.in/uploads/68534996533.pdfIn PDF document text
- https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/qnuh67ma203ll6eu8pm3skefe2/924456710.pdfIn PDF document text
- https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/16a1f8de716ee091c95429489f6d8cd9/velomu.pdfIn PDF document text
- http://yearbookplus.com/uploads/ckfinder/files/81508853559.pdfIn PDF document text
- http://hodgesmageefamilyreunion.com/clients/c/c9/c95619ca3ec29dd030dc8935b97378d4/File/22992733939.pdfIn PDF document text
- https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/b64bec64c2ea07437c8c2e2944304864/raparovelu.pdfIn PDF document text
- http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b8c19a6a4---39598206154.pdfIn PDF document text
- https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/f75cb758eb5cedc81428e810c59769ff/76799504035.pdfIn PDF document text
- https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9715142922---87489043457.pdfIn PDF document text
- https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/3de648d731b77ff68499db1964269001/madudugedubexojotifumu.pdfIn PDF document text
- https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607a305277247---ginubovebitunoja.pdfIn PDF document text
- https://livre-art.com/ckfinder/userfiles/files/setidemuvojozejepelebi.pdfIn PDF document text
- https://electrabicycles.pl/app/webroot/uploads/file/16201704922015.pdfIn PDF document text
- http://littlepearlbooks.in/data/eimages/file/21661077960.pdfIn PDF document text
- http://elturo.ru/img/upload/files/masorir.pdfIn PDF document text
- https://alshaabcoop.com/userfiles/file/migujevorebonuxapinisular.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16096bc93c74f8---19992949693.pdfIn PDF document text
- http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f67db2488---60535418712.pdfIn PDF document text
- http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc802b6c35---7175031972.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_off00010b40.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B40	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00012352.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12352	21900 bytes
SHA-256: `fc5af70761b2527a123078219d5b773630082b0f104c437c47d5fd317f6ef35c`
`font_02_sfnt_off000159d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x159D7	10344 bytes
SHA-256: `df51f67d3a621159ac6a65cfac29825a2781d885a5013cf3035a7cc7ffbdff47`

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