Malicious PDF — malware analysis report

Static analysis result for SHA-256 a014196c196d0a49…

MALICIOUS

PDF

72.6 KB Created: 2021-09-01 03:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 239674d5441f8ff91d271bd052c05f13 SHA-1: 97d74b0247317be63ad6a2c507c902a5e475c60f SHA-256: a014196c196d0a49598c01c49ef42ee7bdfffb6167e73afe2debdb2d2bf5c0b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it functions as a link farm pointing to external URLs. These URLs are hosted on various domains, some of which appear to be compromised CMS uploads, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure and external links strongly indicate a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://nomylo.ru/uplcv?utm_term=power+of+fasting+scriptures PDF link annotation
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607baea1a28ac---84853122527.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/monawuvubewut.pdfIn PDF document text
    • https://groupburuemas2.com/contents//files/fijufojenukevinubef.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/4068754223.pdfIn PDF document text
    • https://areicon.com/images/file/57153624287.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/boxurumujazupiv.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16115e7f1360be---fimofadutavam.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210807123522.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/v09dqhhcerophokjfst96b8mit/gimaxabegatubalam.pdfIn PDF document text
    • https://egf.tw/test2/images/file/wezokavugifigugotavedun.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/verujenonesunufeza.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210609111120.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/xemefovudetefi.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/vitonijugilutovadipegeb.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcff506cc73---74065752215.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/97e2a31e04ce67c93c46c2ca5acd2d2b/xugukugizenokoloxixikaxe.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/d295cc385fcd2aec22ac47a4c3f677ea/gawebugo.pdfIn PDF document text
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/74304857196.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58493884559.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210528_0C3159A0147F8C9D.pdfIn PDF document text
    • http://leguido.net/files/68238138078.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/e83735559496dbd259654946983e1282/fekidiledizitixa.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_off0000baa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA9 16416 bytes
SHA-256: 78f7167388eea9b854920a53edf4d9e2a586f6e190ce9a71566f237b44dd983d
font_01_sfnt_off0000e2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C2 10796 bytes
SHA-256: 98999303260e4ec9523d55e2b00406b4824c9d1c0add9a4534bef7b747c642ad
font_02_sfnt_off0000fbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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