Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f03385b4fe5d8e9…

MALICIOUS

PDF

88.8 KB Created: 2021-09-02 06:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ce95b74702a503f68605065c987d25db SHA-1: bae775599ba08df764f81b11372fd2e57486c7f2 SHA-256: 9f03385b4fe5d8e9038fa6e5647942dd81de8587374fb79ba64ef982ed147a45
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. One URL directly uses an IP address, which is a common tactic for phishing or malware distribution. The presence of embedded URIs and the nature of the links indicate an attempt to lure users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bd708885d6f---56967761902.pdf In PDF document text
    • https://pharma-tools.eu/galeria/file/xenazadu.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/82767588028.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/bowug.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/a6b2557a923acccf948e72db21723d2b/49955524426.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/0be4a4c14ecda2d6a41375f38157cb64/sapawafutubopisomazurofem.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/85051925982.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1cf5e43d9---81252491056.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26a17946cc---46905817800.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a69b2d18136---timixipurekupotemanajesi.pdfIn PDF document text
    • http://inphuduong.vn/upload/files/jiwililulu.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/8bbedf7ae2629898cf634a1b4d7955ed/93916407731.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1689e65051---21898580944.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/mavusosufovojet.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/bunuwotuwiro.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/netojekezek.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/f1dacb738199950f9e9166701b1648a8/kifozuroxikefumijefubaj.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/10026795158.pdfPDF link annotation
    • http://vejwun.cz/images/lexedusumuruk.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e195b77a9fc---31461916464.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e7eacda5a---jasusolubinelolajobovose.pdfIn PDF document text
    • http://kisito.com/userfiles/file/31568255343.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/17461041849.pdfIn PDF document text
    • http://krakowska98.com/zdjecia/fck/file/76578973139.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=words+with+letter+z+for+kindergartenPDF 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_off0000f5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E11 10864 bytes
SHA-256: a2468cacea572e4b13413f0621447ada2d832f409fd1b6dd491f0800b74907a0
font_02_sfnt_off000126fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FB 17764 bytes
SHA-256: 1661c9e8a8bbf74c71170dab620b8771c3b275a0034932a43e72cb4973c58dcd

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