Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2e0f8327403058…

MALICIOUS

PDF

87.6 KB Created: 2021-07-23 19:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3e9efad04712d81a4a1ebe6312cc3a86 SHA-1: 80317bafb5682a22bd3ba6494d2a1fb9ab0b8dd3 SHA-256: 5c2e0f8327403058defe19b03e498053fef0da83c459e93c2b70f8fcdc392deb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to compromised CMS upload storage and disposable hosting. The embedded URLs, such as http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c3eb487e613---xaneko.pdf, are likely intended to host further malicious content or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160728e7746b09---38525057549.pdf In PDF document text
    • http://kibbkw.com/uploads/file/jexifomutexopol.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/5vk6cqf7uociot4ipnd61orna4/34819236510.pdfIn PDF document text
    • http://arlington65.org/clients/880802/File/jikizabusodetosape.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/48e412b12698c09b2028a32e8db11df4/basagiv.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c3eb487e613---xaneko.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98d4501383---masopef.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/resefeg.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a474c8f234e---futiwozajosaxeveboto.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210702180637.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/t7li3iedih99ac6mj4cs4h9eaf/mavumajudajagugosituwotox.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ak9vl8uk9icq0f5vkavhrg158s/94433093524.pdfIn PDF document text
    • http://yuha.be/_files/file/tutuwudujisoludilojejibu.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160940c2e35f19---fomaneroborezij.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/28749833572.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/78eb0626d8d1d2cabbb5a0bb044dbf96/80888339907.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46a570cfb5---92538544503.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/mesutajigesalizud.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/4o4pjjhmij4fq81t9q08n0kg90/19426693286.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085e616704c4---mivizigunuvanuvexiriza.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/b1bdb0a3ee3932a9a3356884efcc9ab8/60990146950.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/33963669538.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/c44e8839ceb9caad451f69ad3f0a2854/kesokopuxojivu.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/dba0fd64667d561c10be239fa27ad256/toduz.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/5ml2l3ipnbb5c6hgigoq04lvj7/jamiligojare.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/kelidobedusorulorakejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=what+month+can+i+plant+okraPDF 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.

FilenameKindSourceSize
font_00_sfnt_off0000f457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF457 17220 bytes
SHA-256: 1461a05d118db792d0df3436a85716064e181b498828a6894b93cad6d8f1a869
font_01_sfnt_off0001214e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1214E 10424 bytes
SHA-256: b19751d3dafcbbb6f4a1522d46ee63f387cbcf68c4afa8569135aa7bc52561ee
font_02_sfnt_off000138b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1