Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0699702baafddc7…

MALICIOUS

PDF

85.2 KB Created: 2021-09-08 03:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c01216fac1ba927fc655285f7f54f0af SHA-1: e4995ff8840f8297da324b3de6a4ed85c2ad5dab SHA-256: e0699702baafddc7abf57292601fb1d0fa378656dcc4f96da37e51f81f344235
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous URLs, many hosted on compromised websites, suggesting a link farm designed to redirect users. The presence of a 'download button' lure further supports the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://catamma.ru/uplcv?utm_term=ma8353+transforms+and+partial+differential+equations+notes+pdf PDF link annotation
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16081554d46e58---nizudenuxibodetukelonejap.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/92801597220.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/3825710159.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/25593810777.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/26557860468.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/89532174116.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/dikevoxusokona.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/29140033293.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/18347185768.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/34222556734.pdfIn PDF document text
    • https://85097781.com/upload/files/zetiwebixeravagazukuvimit.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/95059459781.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/xuleze.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16120a2151ae92---rutunasari.pdfIn PDF document text
    • http://ciskmv.com/css/file/dijitukanixi.pdfIn PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/bixozeguzadoriresuwud.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076ceb635bbb---79888733455.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ffcc4199edd---86282935993.pdfIn PDF document text
    • http://platcometals.com/images/file/3640316334.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4dfa75830---21627334259.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f253d018c81---kafemakugonamawibu.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/kelakinilogovinuz.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8667074bea---xusigerunonuvezegusog.pdfIn PDF document text
    • http://tebsc.com/clients/84181/File/legedemifilarojineforiza.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/23964615858.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_off0000e489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE489 18172 bytes
SHA-256: fab57a0388bf48a566c186e886cf5ffbda7dc6289171924f5f33070fb589fded
font_01_sfnt_off0001137a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B91 11412 bytes
SHA-256: 9049fcf01d82819c7e8b1c0d36f54a189d0db9c0fbefa855815e79339c32ed3a

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