Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9067a0dbda07409…

MALICIOUS

PDF

92.0 KB Created: 2021-07-01 12:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 63d0b6b00310d4657431f5c2c594a7d9 SHA-1: a5d782a449bb2432ba5c11ba44bbad464a3d82a9 SHA-256: f9067a0dbda07409e36dd9edee8a13534f78fb7baf770cc7f28d32773e931721
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The file's structure and embedded URLs indicate it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://southwestlooms.com/admin/userfiles/files/91711839937.pdf In PDF document text
    • https://pjkconstruction.ca/images/file/nisulu.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/42098551948.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/4be16ee2102c0989318b8ba4f675ce58/jodufolijolano.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/21027929415.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/20343948851.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/dizoferetolinaxet.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/9159364274.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608492b5a306a---temokiki.pdfIn PDF document text
    • http://kusadasidentalclinic.com/img/userfiles/files/wujubirebalexakodifebu.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/191tra6s300rbrhoqk6t0vcuu4/11774129991.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8d82b5811---zitumoxebomokaxo.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083881b446ba---fogetumusirosavul.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/62d17962911febfc80f61227a53cbf88/41476622240.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/18925489699.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/64866435683.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/xelapuxitavu.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/kimitazajutubaxuxaw.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/k23ocfcn1rilojshae5b2cv3d5/11458379633.pdfIn PDF document text
    • http://szrealty.net/uploadpic/2021-6/file/2021061223103773499.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a241a3be639---50132732877.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/abb056b2c1c02f7fa981e5c30effeef4/1773221983.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/90a03176fdae4f48c793769e6833c100/79133443006.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b22b5a6f7---levatuziluzisuteva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+extract+data+from+multiple+pdf+files+to+excelPDF 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_off0001017e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017E 10956 bytes
SHA-256: c1d119d9fa8595c3ba361117e4476d8a8c625a62fb17ae5c5f0a48f17aaaba44
font_01_sfnt_off00011afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001330d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1330D 18108 bytes
SHA-256: 82038b55b223600b5ffbe63e22ecafbb809dacd9f641f2766422df16d8b52c40

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