Malicious PDF — malware analysis report

Static analysis result for SHA-256 47188ecaecd23c1b…

MALICIOUS

PDF

112.0 KB Created: 2021-09-08 07:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f091443c0b1fc8bcaa28c9e3d47a7e05 SHA-1: 9faa1366cd16bda4f7616c4179d9bb401f1af157 SHA-256: 47188ecaecd23c1b8d1062fe078c76eaa74963c9e04c69b41ed042c22be0cf64
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable domains, consistent with phishing or malware distribution tactics. The 'SE_INVOICE_LURE' heuristic suggests a pretext of an invoice or payment, further supporting a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://wib24-admin.de/uploads/file/11512265106.pdf In PDF document text
    • http://driver-jazda.pl/upload/file/mirugebitazigoju.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/21890575355.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/4dd0cdd971c6ed681f101c26fbaa5abc/bowomemalu.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/55460811896.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd682673ad9---rupolesojo.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c896a0befabeceaac54fb738f20d743c/34666963583.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/8950519720.pdfIn PDF document text
    • https://faltprasten12.se/anvandarbilder/70/files/36580450673.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/u7cqbj7tujqt4pi155blbklfl7/tolekegixobapuputolijet.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/24208764972.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/galepelaguzo.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/76045886700.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e95982b6c13---82037128581.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/28663879576.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c9c6d9727---derizigorimumajonovirum.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c75c3fda1---23093217596.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/e1stuat83687i93098p6b1om3s/13802513879.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/46853599965.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/wenori.pdfIn PDF document text
    • http://zaiger.ru/img/file/pudekebadukut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=evasion+fiscal+en+mexico+2017+pdfPDF link annotation
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/pigukomova.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_off00014b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B1D 20316 bytes
SHA-256: 1d5e90d2abbb98ad8fa11b4bd0b02accf906c485c16bcb9ff85c70b11ff11233
font_01_sfnt_off00018010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18010 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19827 11076 bytes
SHA-256: 79d1ee1607554679bf2ec0e01926842071472608504fd4f2a9e9631281f32f31

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