Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe5bce6e8fac8a3…

MALICIOUS

PDF

91.4 KB Created: 2021-08-25 02:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 11f476ab45242cc9c120365cff468325 SHA-1: 3db30204eb5851369a623ce37b02b6c4d8e15568 SHA-256: abe5bce6e8fac8a316d7a2ce007852a7c576f8e83a60004d9c2a757149e87963
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. ClamAV and ML classifiers strongly indicate maliciousness, with the PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristic specifically highlighting the use of compromised upload storage. The primary attack pattern involves luring users to these external resources, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 6

  • 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.
  • 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://telmeed.com/web/ckfinder/userfiles/files/nanaboruriwawijufigep.pdf In PDF document text
    • https://xn--interpeas-r6a.es/upload/files/dejofuludis.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/sg0bc3qr5jruh1epr6t1g9383p/gawiforomolopuladeba.pdfIn PDF document text
    • https://chptravel.ir/data/file/52916780203.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/romesako.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aff147ec68---63888360420.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c1f0c68c---16314632571.pdfIn PDF document text
    • http://hitechdentalhouston.com/uploads/files/92582615168.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f770c97f313---51959305836.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c510399640---37422985300.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d8cb816ee---61347541338.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/c131343113a32b40bea34cea56811485/safavokabor.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cc4b32196---66774658025.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607815490e1e5---pezero.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080361680f96---pixoku.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dd6f1c49e8d30101d676c007d0214ec7/ludipelimi.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/6076358738.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/wiwume.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16086f11f380cd---puxonu.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2d9c2178c---golizufidago.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/45110116612.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/68861766412.pdfIn PDF document text
    • http://familycrawford.com/clients/3/31/31f1fdc6e90c562b7578e9c437f7c1bf/File/60537828704.pdfIn PDF document text
    • http://griesvoegwerken.nl/UserFiles/file/tibojeludo.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/jutebigimonawikewof.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/27802687277.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/jmjpn1471sq6tmsr54grh5gcrl/lumokofemelinefivegekaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=divergent+streaming+full+moviePDF 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_off0000feb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB2 17656 bytes
SHA-256: 0e13124904082cec857d2ec189b48e0ac170deed7e2de386a3012f8b016cccb8
font_01_sfnt_off00012cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000144c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C5 10724 bytes
SHA-256: 854c226f38033ff105b32c4c8aae3dda3e68fb4ac0de5d11a423c25da0642ced

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