Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea645da8ce7e11c…

MALICIOUS

PDF

89.0 KB Created: 2021-08-18 15:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 2fd4011e6cf1f972cdcb23803dde897a SHA-1: aa43a34a65f2fa3480ca869fa5aa841ae0bafe00 SHA-256: 4ea645da8ce7e11ce7d78a8c2330e51f8802149f33d403767a51da73de383702
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://drafthe.ru/uplcv?utm_term=blancanieves+y+los+7+enanitos+cuento+pdf PDF link annotation
    • http://bantinnhadat.com/users/files/18855382872.pdfIn PDF document text
    • http://bio86.fr/fichiers/maxututuxozulumev.pdfIn PDF document text
    • http://cmtsport.com/pliki/xirowakijolexulu.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160994f68a60a0---23487727587.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/povepiw.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/11982488026.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/2107478554.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/59d83714927c56118c58b256921081f8/pogaponesireneribupema.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/guwerox.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/segaloxibotexipikipedabej.pdfIn PDF document text
    • https://nexusmediation.nl/files/7289335103.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/32939381729.pdfIn PDF document text
    • http://halmar.info/userfiles/file/4855937075.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/69331267537.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/422797244add845511161b0a7889ac55/90257305831.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/opc6qdn7hk894c5se3ts7n5p4o/bititolatojujifavuma.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/16760562218.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/cb8257a673b0865eef18b34bafee4e98/50327032047.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/10281667841.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a29766c45c74cf51fc7fcecf065b22bf/xamoresowebedipipiritu.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078b14b75f91---berifukobu.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/8e82badd525bb28e9e3e091cdf40cc82/danelumolagimorojawi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78E 16380 bytes
SHA-256: 677e9695f62afeefa27de66f2ae2c7cbd721294f5310bfc85fc12255cd4c105a
font_02_sfnt_off00010dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC3 10896 bytes
SHA-256: d596773a10780beed01cd5f966c87eef6b60f0c657259e46a8b7b15928a94011
font_03_sfnt_off00012738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12738 17500 bytes
SHA-256: ae78bd6883192de0c853e8727d53162caf3f8bfb74116e583f5cec9a82c22a77

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