PDF malware analysis — malicious · fe432736aa97ed12

MALICIOUS

PDF

83.4 KB Created: 2021-09-07 01:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29

MD5: 94991b86f92a8e50b3ca2024e2219350 SHA-1: 914841a74fabc8bd0ae37161bf00d0f808f3ff87 SHA-256: fe432736aa97ed12ae278de8705e098d5effec86695525d9f29ec986cf4a5370

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 hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this, pointing towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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 https://drafthe.ru/uplcv?utm_term=kitab+sulam+taufiq+petuk+pdf PDF link annotation
- https://semsaesp.com/ckfinder/userfiles/files/vatukapipujamafog.pdfIn PDF document text
- http://pogologistics.com/ckfinder/userfiles/files/nulewefoperoxosega.pdfIn PDF document text
- https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/2b39946cbd116e34b3bac7f2b25dc219/toxajijusaboxolumoje.pdfIn PDF document text
- http://www.mueblesgamez.com/ckfinder/userfiles/files/xewokufizudev.pdfIn PDF document text
- https://penzionradvanice.cz/res/file/firobokarujemimef.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a786d2cb467---lanus.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c137451efda---papanamepaf.pdfIn PDF document text
- http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/3c49992982587be72fa00e7d5f6c043b/dolofewugaronuwukapapa.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fb8716805---66921517221.pdfIn PDF document text
- http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608502b0ae100---51121244149.pdfIn PDF document text
- http://sakem.org/userfiles/files/84591223471.pdfIn PDF document text
- http://guides2alpes.fr/uploads/file/midudifolomejodobotapuxi.pdfIn PDF document text
- https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/65237309148.pdfIn PDF document text
- https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/a33790b7575472558c86b6573fb96436/26098200826.pdfIn PDF document text
- http://stark-tools.ru/images/uploaded/parudemijif.pdfIn PDF document text
- https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/1f2a831e54ef5f581b48809925bb2198/kegolojabazasugix.pdfIn PDF document text
- https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e9884fcf---77093830696.pdfIn PDF document text
- https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/fe9005a65d8f8a846f9d24b501d32d1a/fizakedeze.pdfIn PDF document text
- https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/qq2p75r7ien4kso3bqvmrc4t06/18220725781.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/029e2444d99338065b63bb9e89934f7b/34225123987.pdfIn PDF document text
- http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160df71eee0a57---jomagilobatus.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a109b50cc7f---27047257617.pdfIn PDF document text
- https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/75038a31b8075b63625c6db3fccad92e/vujerumutide.pdfIn PDF document text
- http://namjapizza.com/app/webroot/files/modovoboruni.pdfIn PDF document text
- https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607853f34e62a---49375697605.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_off0000d5eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5EB	22840 bytes
SHA-256: `e074c66d08f5cbbf2b45adb02c178278555b43cca1022b74419fe6121811f304`
`font_01_sfnt_off00010f0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F0D	10804 bytes
SHA-256: `88770726dc770f080b9e0c744fc17b8fbe7b185ca9b04556b2d210a9bf15248f`
`font_02_sfnt_off0001278c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1278C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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