Malicious PDF — malware analysis report

Static analysis result for SHA-256 947766f8e49fba2f…

MALICIOUS

PDF

85.2 KB Created: 2021-06-26 20:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d653f98a76f362e54791c0de05b6931b SHA-1: bceeeb636e2f9aed2b73a3e18d18e609f12ba3ef SHA-256: 947766f8e49fba2fe4c5fa47af1ec5e17f2884b01cc4313403c674d7e29b3f62
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/sobimes.pdf In PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160be508ab2949---nesogitupopagax.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/45424803677.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/68608f27b7144dc7b090027e4ed576e7/82294052167.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5acf47097---84910626257.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b26ae16fac2---14351997728.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16092bf917a243---povuzadetine.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085536316b2c---tutizalorizuwuri.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/83839582312.pdfIn PDF document text
    • http://emmanuelmissionarybaptist.com/clients/74938/File/bezagutimuxenupib.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cb425de9a---gaxudip.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e361cea7e---tazonotamaxitomugonarix.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d10254a9d3---naxanupikavexopukurutav.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/reribojan.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b0382f2d8f1---patalozezeluwamilavekivil.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/7c6a96690d2a7f1ec2d09f832ed7eded/11765278323.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/remonipilimaxagolu.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ba587e55361---95200297907.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/b8c9a7ca480f69707bced1abd14eb403/22830308741.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/310524960.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/a3fb97bd7ba6cb900cd171de96714c41/gumow.pdfIn PDF document text
    • http://biosite.ru/images/news/file/8540340136.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/maniwafim.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/39584531451.pdfIn PDF document text
    • https://ksuskalology.com/images/file/vawarubazelebapifubedej.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/zajuseker.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=software+engineer+cover+letter+entry+levelPDF 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_off0000eb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB08 16700 bytes
SHA-256: b5546533b680e3732464500a66534b77e0429f11601e497dbde81fbbc5089e74
font_01_sfnt_off00011653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11653 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6A 10684 bytes
SHA-256: fa55fe98ea00e02ccefc06851810d793e7865f88ff9fec29d048fc1e0cd27cd0

Open this report in the interactive analyzer, or submit your own file for analysis.