PDF malware analysis — malicious · 1eca08a3dea9ffd1

MALICIOUS

PDF

101.9 KB Created: 2021-08-21 01:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27

MD5: 8975ac49c1d438b7ba8f30c9a82e364e SHA-1: 212f6f1793754af06bbc761127abe6691e4ddb66 SHA-256: 1eca08a3dea9ffd127f55d8beeb4ad6fcd1d475d1dad7991ab9da54a598363af

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggest a link farm designed to redirect users to malicious content. The primary attack pattern involves luring users through these links, likely to a phishing page or to download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9877

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://mediaget.ru/userfiles/files/48478712369.pdf In PDF document text
- http://akifkasaboglu.com/esatfisek/images_upload/files/xobutuleruxegaditofomuxo.pdfIn PDF document text
- http://eunlocker.com/Images/Editor/file/66383311676.pdfIn PDF document text
- http://jamessham.com/admin/usercontent/file/funedilugunuzulefamuf.pdfIn PDF document text
- http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928d30260f8---63323300093.pdfIn PDF document text
- http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbea27529b---zavujofonopi.pdfIn PDF document text
- http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6075117a0---5171223287.pdfIn PDF document text
- http://frutapacargentina.com/ckfinder/userfiles/files/bituvexavinuvozorokutu.pdfIn PDF document text
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a568ca03dd4---libejutimutewiradu.pdfIn PDF document text
- http://agriturismocorteerbatici.it/userfiles/files/jevujebizepuxokolesu.pdfIn PDF document text
- http://redfordunion70.com/clients/869360/File/totewosafosijofeguf.pdfIn PDF document text
- https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606e5cb99a235---50465776148.pdfIn PDF document text
- http://phunggia.biz/userfiles/file/31955723027.pdfIn PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/4e121da8a925907b1336fbd4c2d6b541/54147064840.pdfIn PDF document text
- https://soudurelausiere.ca/upload/editor/file/genuxepasapabobaxifiwux.pdfIn PDF document text
- https://markyatirim.com/resimler/files/80081342470.pdfIn PDF document text
- https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/ee3d5c81f5b438588aa4b4a5447d8d11/68733602968.pdfIn PDF document text
- http://sentralperdana.com/file/50554783098.pdfIn PDF document text
- http://e-hematologica.pl/users//file/4342606052.pdfIn PDF document text
- http://korea-seals.com/ckfinder/userfiles/files/75356055927.pdfIn PDF document text
- http://ajivikafinance.com/userfiles/file/72789404471.pdfIn PDF document text
- http://noithattamphuong.com/upload/files/6583713507.pdfIn PDF document text
- https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071abb136ddb---95755674550.pdfIn PDF document text
- https://aczv.fr/userfiles/file/vomojifewetis.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c720b0ef939---gugirukuvofuravovilonolox.pdfIn PDF document text
- https://balbok.net/admin/ckfinder/userfiles/files/ganavepegus.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=gran+diccionario+ruso+espa%C3%B1ol+pdfPDF 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_off00012069.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12069	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001387b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1387B	22084 bytes
SHA-256: `8828ab3468419d4df161473cb7fc455defc34579d9a3c8057a3385a3cb6234c8`
`font_02_sfnt_off00016e9e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16E9E	10860 bytes
SHA-256: `f14917754828900ee5fbaa272ba7b0d05b1a1bb29a2df84803b2a9abbcd38051`

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