Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80b537edabac842…

MALICIOUS

PDF

87.8 KB Created: 2021-09-18 02:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 87ad87e800be288972d418e6f486bebb SHA-1: 5e7722999099c673e1e44a51658d791ace5d5203 SHA-256: f80b537edabac842bd91d097fdc421b8f4483be92c0bfd0bc2b364193315c87e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' lure and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=free+download+lucky+patcher+for+ios PDF link annotation
    • https://bharatceramics.in/ckfinder/userfiles/files/27382552920.pdfIn PDF document text
    • http://divyabodhanam.org/userfiles/file/lediwomibagedoli.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/wuleruruna.pdfIn PDF document text
    • http://www.eatvirukai.lt/uploads/files/gurivutunasilad.pdfIn PDF document text
    • http://eegbiofeedback-leszno.pl/userfiles/file/mokajatowikepu.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/27428649137.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/89720314754.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/21995096726.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/wowojuxuboxemizo.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614514ba7b503---2755388797.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/55585039360.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613c11e53e2d0---busomurumo.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/mipazukapuzipunamofijux.pdfIn PDF document text
    • http://primeasset.hu/fileok/file/53461883262.pdfIn PDF document text
    • http://fullerton.kopanramen.com/uploads/files/10952537837.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/60668905115.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/738772908cf14ceb5bb032bb42f9e62c/zijisegotada.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/236e8f0e8bb085b7adbf4f9de15969ca/84379511396.pdfIn PDF document text
    • http://frutapac.es/ckfinder/userfiles/files/jojawepaw.pdfIn PDF document text
    • http://stepasidemedical.ie/images/uploads/file/vorozulirujixa.pdfIn PDF document text
    • http://www.drivingschool-brno.cz/files/files/80158659959.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341a277ff96---82440205831.pdfIn PDF document text
    • https://ysh.my/userfiles/file/71571968103.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/tulisekutafibiwapaj.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/f8mbhi1po9rhhr07j5ajktn4h0/vopodidogowon.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/98289795386.pdfIn PDF document text
    • http://net-marketing.hu/images/files/52082132066.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_off0000ee6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6F 11084 bytes
SHA-256: 92f3e41a563824a2d5ebf801b192523682d4e78df030f28d194c49dc0ac0883e
font_01_sfnt_off0001084a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001205c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205C 18660 bytes
SHA-256: 9e118dbc11b6c9da4a5caf10a0a8f8093bdb7cbdfdef20d2e80dc5b7aaebdfe3

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