PDF malware analysis — malicious · e5d03fdc22354b3a

MALICIOUS

PDF

86.0 KB Created: 2021-09-02 04:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 258426f62d69b44ff419f2b2e9cac778 SHA-1: 3c7487aeaf34cabbb784b911eb6771739c6120ec SHA-256: e5d03fdc22354b3a23fa7ae994935ef73f1c24724a127c36dcdc5919b033a55f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript for malicious actions, and the presence of numerous URLs strongly suggests a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

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://drafthe.ru/uplcv?utm_term=sports+illustrated+swimsuit+pdf PDF link annotation
- http://valeneighbors.com/userimages/95817862775.pdfIn PDF document text
- http://ticaproduce.com/ckfinder/userfiles/files/regevotogaguguxuwexigumib.pdfIn PDF document text
- https://deltaguvenlik.net/userfiles/file/1336729559.pdfIn PDF document text
- http://ehomerealestate.org/images/file/14338972663.pdfIn PDF document text
- http://biosurfest.com/userfiles/files/donisevagevubavetabavori.pdfIn PDF document text
- http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16079bcf00d0c1---18092558822.pdfIn PDF document text
- https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/e45cbf95ec5337812d0a56890d42d581/fopolijaruwuxepexupozuxup.pdfIn PDF document text
- http://usaoxin.com/userfiles/2021-5/file/71559983232.pdfIn PDF document text
- http://hysansam.com/fckeditor/userfiles/image/wafitakizulefewag.pdfIn PDF document text
- https://pmsp-me.com/userfiles/files/gowudukomolir.pdfIn PDF document text
- https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160fe9d22cf72c---rifar.pdfIn PDF document text
- http://prime42.ru/userfiles/files/bewepalemedugosivoroved.pdfIn PDF document text
- https://net-mex.hu/ckfinder/userfiles/files/xumafulilarikejilekofe.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16074349ad20b9---vawutolafawusezome.pdfIn PDF document text
- https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/54ca14164513ac6a619a796be77a04a2/79426645148.pdfIn PDF document text
- https://mokshadhamnepal.org/userfiles/files/72764755527.pdfIn PDF document text
- http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2fcc7a77b---rexojoneribepuxitozugukav.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/a832376ea30e09e1c55db4214620ccad/67339061717.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2c0401b7c---titirolajimasagowivuzepen.pdfIn PDF document text
- http://crmrealty360degree.in/ci/userfiles/files/vijuxatimokugufuwamedig.pdfIn PDF document text
- http://zimmerei-possert.at/70011924233.pdfIn PDF document text
- https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/6a03d72a530668499894a905ab72fbb3/sopibiluvivominotusazu.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/7b86ebbbecaf62580a446705736c7609/87664219496.pdfIn PDF document text
- https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/af6b0b0b50929eb8e48365b027c25487/89981844018.pdfIn PDF document text
- http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1607c637819ab3---22669994775.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_off0000e60c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE60C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fe23.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE23	10816 bytes
SHA-256: `69d91b24eb92d01b60697f32e4699e6f17f2b61539633aee442ce47fdc8a1f9e`
`font_02_sfnt_off0001171c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1171C	19220 bytes
SHA-256: `d47b367c027c6e2766ff3e8ab58721eb23c2abb4e8758b6548f03cf255b5f775`

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