Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7d00401eec7c8b…

MALICIOUS

PDF

81.4 KB Created: 2021-09-13 20:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d14ab9710b952d1431549af6ce2fe660 SHA-1: 4ff4090a977ec228a75499086f67e4b8acce80b7 SHA-256: 7d7d00401eec7c8bec02f52cb7e4c81b51242cde6e10366dc2e50a0c51b828f8
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple disposable hosting domains, with one URL specifically mentioning 'download minecraft new version android' and another pointing to a compromised WordPress upload. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://gregoryshow.ru/files/file/89595934294.pdf In PDF document text
    • http://verzorgingsindex.nl/images/uploads/43458920773.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/gejaxotixatotik.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/jijimibudifomilumuban.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/94818491109.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/15980141683.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/35249172697.pdfIn PDF document text
    • https://asiapharma.la/files/files/bikemogakeb.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/visowolijepa.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/34018133939.pdfIn PDF document text
    • http://canyonmeadows.org/userimages/98361304262.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613cda391b990---gudisezoxoliwuxogizagilen.pdfIn PDF document text
    • http://delve-cr.com/uploads/33002064217.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/e0ef4c374f46167f03d33360e49fbd45/favokapuru.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/17116183753.pdfIn PDF document text
    • https://wroclaw-effatha.pl/grafiki/file/juremoxevojoviteduromud.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/vutaz.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f02339c406---2846007505.pdfIn PDF document text
    • http://dzbnf.com/upload/file///menuxeweran.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/89388057487.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/25956865603.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be6e369bbf---jigof.pdfIn PDF document text
    • http://mrpennarak.com/user_file/file/81068772204.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=download+minecraft+new+version+androidPDF 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_off0000da19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 10792 bytes
SHA-256: 52bde7c9f357d38ab97753bf1c6550b0f8163f653f3106b5fb7bc4aa21a0a14b
font_01_sfnt_off0000f2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0A 17164 bytes
SHA-256: e6e6ee35dc4407faea716d206af9b26474e42294113d7df46fe15a7c57ac8599