Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee9dc62adb3e8fb…

MALICIOUS

PDF

70.1 KB Created: 2021-09-08 23:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bb61009f38401639ce664202cd019613 SHA-1: 80f83df869fd4279d07afd74c277d486076771fe SHA-256: eee9dc62adb3e8fbc0c2488a7a85759a03747d7c16afb2b2176129b4a7417811
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable domains. The embedded URLs point to numerous distinct hosts, suggesting an attempt to distribute malicious content or conduct phishing operations. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://studiopros.com/userfiles/file/ In PDF document text
    • http://s-pack.kr/userfiles/file/20210908022849.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/53610187337.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/74504928486.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/90380881837.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/ketoretatotumakizebubepa.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/kimipuwakigu.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1630776263kosoferemidex.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/65318196546.pdfIn PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/35835647258.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20210902_082958.pdfIn PDF document text
    • http://hibertek.com/image/files/20210901_214653.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/zaxumutubakogokidi.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/pafujiligoka.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/9f6d5571da93f896508c5ba2b64f564c/46066396120.pdfIn PDF document text
    • http://atek-ent.com/upload/file/pogamokema.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/mopuwuxusijezo.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/zasoxololop.pdfIn PDF document text
    • https://digireg.it/upload/butofevedivu.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/39555289968.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e36fd75e5---loziwuredow.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/20654587696.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/55049857872.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/retazamaxugaxasugowuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=android+psp+games+download+freePDF 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_off0000b3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B4 15184 bytes
SHA-256: 9adb7a2d4b2f348b32a70a747bf23cf75091a3eb34667135e0586e1b1a97347c
font_01_sfnt_off0000d9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F8 10808 bytes
SHA-256: 76340ee49c0746e90c8dbef013b5d3603c61608c6fc181d66d6d02b36ebb48e5
font_02_sfnt_off0000f2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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