PDF malware analysis — malicious · ae379138e5a0bc13

MALICIOUS

PDF

91.8 KB Created: 2021-09-01 07:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 9b44d2c088eaadd0c60a02ebda07a04a SHA-1: 5cca1f7acfdfa71aa7c4985974fd17f2aae637a1 SHA-256: ae379138e5a0bc1387935959e31e5b23600fbd5a3d3fc31301f2999fe9bc5e2f

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable domains, indicating a likely phishing or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with attempts to lure users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9913

Heuristics 7

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0835dd545---70162469200.pdf In PDF document text
- http://ledesmasportsmedicinesavannahcentury.com/clients/4/44/449a5b3489ef279447e90cf6cdd72f1c/File/36750497217.pdfIn PDF document text
- https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ftnlk6k6psout07nlgvorn74ng/vokuboxanemamekugizip.pdfIn PDF document text
- http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca338f1a68---41292469244.pdfIn PDF document text
- https://madopin.com/calisma2/files/uploads/jufokexeruwidulupatejov.pdfIn PDF document text
- http://hilltopperalumni.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/9654220308.pdfIn PDF document text
- http://stin-verdon.fr/assets/Image//files/91685485327.pdfIn PDF document text
- https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075befe3d223---79422680011.pdfIn PDF document text
- http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606fea9b24190---nigebufosam.pdfIn PDF document text
- https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/97a5ff414d0448ede3001fe279402706/duzawoxivebigesadolese.pdfIn PDF document text
- http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a6d96d282f---36726357501.pdfIn PDF document text
- http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/71886067522.pdfIn PDF document text
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/a1d577b7c9007f06c174372c71971205/dosepopesatozumogaf.pdfIn PDF document text
- http://schodylux.pl/userfiles/file/gadudulenilodozejaxewij.pdfIn PDF document text
- http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d0aea4322---suwekozagufozevuw.pdfIn PDF document text
- http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076616d7872b---fepiguvubelapivotodigub.pdfIn PDF document text
- http://bet-balance.com/userfiles/file/boluf.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b86f9ba8573---pelaxizuzajifig.pdfIn PDF document text
- https://zohopin.com/calisma2/files/uploads/20523019156.pdfIn PDF document text
- http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc7799392f---kurenelibudijenu.pdfIn PDF document text
- http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843ff22f782---zofokoligaz.pdfIn PDF document text
- https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/14e27dcdebb2468b78257205b88370df/88221166266.pdfIn PDF document text
- http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/75300ec5864825548a15bc70c6061a80/bikipapimezepege.pdfIn PDF document text
- http://apexhealthnutrition.com/newerac2c/userfiles/file/59322285280.pdfIn PDF document text
- https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16084fb5e3004a---doronenuze.pdfIn PDF document text
- https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/9tsd76ljujbivoql4sv7hcogj5/43459914215.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=4+basic+needs+of+all+living+thingsPDF 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_off00010490.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10490	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011ca7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CA7	10844 bytes
SHA-256: `c807642ea9e2a2f0b82d0f8d2d448033e67bd83a8f4f5a95997ec9bd3f95df10`
`font_02_sfnt_off00013574.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13574	16928 bytes
SHA-256: `a76fe75a9ca013325278cf2a17a96cbd7997f6ffb02a328016c002922cb89996`

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