Malicious PDF — malware analysis report

Static analysis result for SHA-256 0458317e813a4d6c…

MALICIOUS

PDF

113.7 KB Created: 2021-07-16 12:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 29d8072f346ca8def9a343ed6b349652 SHA-1: b91d18c4de6461bc3becc6588e20b09dee59af73 SHA-256: 0458317e813a4d6c4735a5642577cb128af5a74794f4137e2dc4d8a5acad996c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate effort to create a large number of links on potentially untrustworthy domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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 https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/10c1190e5782176597245ea0c8ef5b97/kenojobolavekini.pdf In PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f78cabf63---24516048450.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160800572a797e---leparekan.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/29215118245.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/tawamagulopi.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/6d682f3bfdcb461fcaa75e05536a17da/lepujesa.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786fd151474---magowetovedad.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d14edccae5---83146147251.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/bbit50h2mi7cii4g18nrfah9ui/86033882764.pdfIn PDF document text
    • http://centronegozi.com/public/29995493330.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/91f019ae77b768dd093d2165d666caa8/nuzat.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/kiresekebofel.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/xadibijawaxijotinoluveti.pdfIn PDF document text
    • http://grupophi.es/uploads/files/tumejafawodeli.pdfIn PDF document text
    • http://aweibel.com/Photo/file/60767756580.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/c2c426e0d9b3041ee0eae08b6cd116b5/17245054690.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/316117500.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6edfa75e38---74118234325.pdfIn PDF document text
    • https://egca.fr/userfiles/file/kumafexanusajewa.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c51590d73a5---86814727592.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd742a6198e---ruxokanej.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c529397df35---86054382467.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16092e6138878a---wuzovigixisenatimapu.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/tulimevojodes.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/0e0e2c82a37375f4d80adfed1c2b7d9d/nilizoxezusarabi.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb10005753---28121573282.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=poe+trade+how+toPDF 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_off00015c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C49 17904 bytes
SHA-256: d51baffcfdf2fede994f86f2ac9ab1f76a58246b9a8c3f8009a51be78d79e22b
font_01_sfnt_off00018af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AF1 10020 bytes
SHA-256: 01a9eb9b49c7cdd091a188d20923b32c6af254e9bc468a380aa3a964fbaf80c9
font_02_sfnt_off0001a163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A163 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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