PDF malware analysis — malicious · 80d8e4f9b709af14

MALICIOUS

PDF

75.1 KB Created: 2021-09-19 09:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: e435d86009413f92b9e58bf22ca0af94 SHA-1: 663273bcf4761942c83ce710cb078c4f1225a7c2 SHA-256: 80d8e4f9b709af14482b06276025077fa38409f413e1643c06c4b9b447df5e3d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous external links, many pointing to disposable hosting or compromised WordPress upload directories, suggesting a link farm designed to redirect users. The presence of 'utm_term=apk+for+live+tv' in one URL indicates a potential lure for malicious application downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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://oniceh.ru/uplcv?utm_term=apk+for+live+tv PDF link annotation
- http://dulichgiahy.com/upload/file/89713706061.pdfIn PDF document text
- https://jasmijnbloemengroen.nl/userfiles/file/46500957211.pdfIn PDF document text
- http://kingalbertltd.com/uploadedfiles/file/40399425927.pdfIn PDF document text
- http://hydrem.ru/images/file/dogapite.pdfIn PDF document text
- http://pretaporter-pegah.com/userfiles/file/87751624739.pdfIn PDF document text
- https://mandarinusa.com/userfiles/file/1631094657.pdfIn PDF document text
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613862d4e19d4---99078839130.pdfIn PDF document text
- http://chistogood.ru/admin/ckfinder/userfiles/files/51274970234.pdfIn PDF document text
- https://bokaichenyu.com/upload/files/70875366535.pdfIn PDF document text
- http://laihoawedding.com/app/webroot/upload/files/gupisobale.pdfIn PDF document text
- https://tybistanbul.org/resimler/files/likupobibedo.pdfIn PDF document text
- http://alanaf.ru/userfiles/files/19557832628.pdfIn PDF document text
- https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/pkoc3i7b3j8dedgscvkgc79834/gunewuwuridavizelugawer.pdfIn PDF document text
- https://www.edmcenter.xyz/ckfinder/userfiles/files/37279508677.pdfIn PDF document text
- http://circolosilverblufitnessclub.eu/userfiles/files/84982604798.pdfIn PDF document text
- http://4reality.cz/userfiles/files/81348740758.pdfIn PDF document text
- https://sindonis.com/userfiles/file/kezefowowaratidimob.pdfIn PDF document text
- https://ayurmitra.com/files/file/35844420866.pdfIn PDF document text
- http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9b4258d18---40761881487.pdfIn PDF document text
- http://studiofranzoni.eu/userfiles/files/85494886581.pdfIn PDF document text
- http://aaas.handyfriendship.com/upload/files/80344988977.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_off0000c3d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC3D8	17356 bytes
SHA-256: `b5705ddfc41d7a22d6abed414c9bf73addbc5e0f99987f3c23685d741e745826`
`font_01_sfnt_off0000f0bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0BD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000108d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108D4	10056 bytes
SHA-256: `8ba6240158201508ef1d6e73bfebd1350bb8a8f54ec934e095a3d49513eb4394`

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