Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ae4da2aa8426cf…

MALICIOUS

PDF

86.5 KB Created: 2021-07-31 21:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 65f27ac4ba474214a4d8a10dcd96feb6 SHA-1: 2ca11ca3ff29fce1f031627ccbba052537eb48df SHA-256: 09ae4da2aa8426cfe6fc726a7106995650505b08c4c997d068b383a43d86e134
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating it's designed as a link farm to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://synerhu.ru/uplcv?utm_term=adanga+maru+hd+movie+tamilyogi PDF link annotation
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa795323cb---jixegoratepisujuxuwib.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608abf7f243a7---60289945973.pdfIn PDF document text
    • https://collegemahan.ir/basefile/collegemahanir/files/sefetenuwugofidolugep.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/8ff92823dfa66b1d9f83531eb5508a5f/18545922958.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160905ae2c1457---kipagodeziwoxukumedato.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/42075445060.pdfIn PDF document text
    • http://minhanh.com/files/79656873589.pdfIn PDF document text
    • https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/48050629752.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/jucrliqnkla2mb7mtb7orupg6e/41080410146.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/6832006335.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/sovusokivafuzazixezoz.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc397338b9---93475047517.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6caf0ed84---puxegozapiduduwazerisifim.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/luzusap.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/bisap.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/1sqara3at3m7deglq4ikqhls1o/18220932597.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ba5b0b795---tesodurataji.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/8202e8e2d5493bd45b99593a7d024774/73894820958.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/jasiwovajader.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d618255650a---67555500007.pdfIn PDF document text
    • https://mauspro.net/upload/files/44611257803.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.

FilenameKindSourceSize
font_00_sfnt_off0000efab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAB 10788 bytes
SHA-256: 22fa7efaf2f91c01d311f74a01d307ce938860241a5233f5dd025e62489eb9d5
font_01_sfnt_off0001081d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081D 16740 bytes
SHA-256: a3a3e722ccbd35e489cae723461b7be87826e7cf255a44e17092f0e49c297a3e
font_02_sfnt_off000133b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1