Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f2a04c02fef2bc…

MALICIOUS

PDF

76.9 KB Created: 2021-09-15 15:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3a97f6db2c3a25dfdb01eebcea6e84b1 SHA-1: 64eb869b8b08144dffe10aa2fcab9c30b76da84b SHA-256: 47f2a04c02fef2bc1b4d9104382f7a3c8da4cb375a4f3a4289e8f8ebd970432b
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded JavaScript stream and numerous external URIs, many of which are part of link farms hosted on disposable or compromised domains. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to mimic an invoice or payment request, further supporting a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://queure.ru/uplcv?utm_term=how+to+change+the+background+of+your+text+messages+on+android PDF link annotation
    • http://titibbs.xyz/js/ckfinder/userfiles/files/seniberapukafavez.pdfIn PDF document text
    • http://gojjang.com/uploads/files/39970361080.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/b0e8653b6964456315f039ca73c9023c/newegawikar.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/kafidexig.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/masadonaxeri.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/30418367504.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/jixawobesagiwewi.pdfIn PDF document text
    • http://abnicum.ru/files/file/nawimet.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/benososogunuvagawen.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/0801d92fc05a22f1a6e9dcfbd1662539/94195873385.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/jipemerebitamajexatetelo.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/tefowagexazixa.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/1483720363.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141cf294dff0---10405706671.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/bowawurotadigu.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/84464958580.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/71711653189.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/jikakidozolovofolomuda.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/pomazakewuguzuruporovubo.pdfIn PDF document text
    • https://tcremich.lu/files/files/sujuworezakow.pdfIn PDF document text
    • http://ohdiabo.net/images/ckeditor/files/53415857104.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/45207615869.pdfIn PDF document text
    • http://standardamulet.com/files/files/rawevimaxosigozaruxub.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_off0000c69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69A 11500 bytes
SHA-256: 812d199e67bb2036ea42d289331bb51eaff30f69d999766f99c0ae5cb2d71043
font_01_sfnt_off0000e182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE182 17340 bytes
SHA-256: d180aa4ec5dae3cb8032320b5c896353fbed77ed548d8bc038000649883bd36b
font_02_sfnt_off00010dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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