Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7a75fc5a416718…

MALICIOUS

PDF

80.2 KB Created: 2021-07-21 02:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 63b4fd23342019e03392de86541ff62a SHA-1: 89c93000ab035e9b8e61f2f59aa0c1e367285e96 SHA-256: ad7a75fc5a41671830bca27747a3c9145a7c0d338081839f85e030dacdfdab86
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to distribute malicious content or engage in SEO poisoning. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/c0764370d3ea7f159ab80d64926b8221/59618224699.pdf In PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a179c9a16---dijele.pdfIn PDF document text
    • https://norservis.com/files/files/8278055573.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/wugigatekutute.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/zokezomul.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/75031503554.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b30ab133ce3---48005432894.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/cb40e5a2f7b128eba28a6821a0885cbc/jogexirudotulilewuwubuwiw.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/63284143160.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/708453231.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/43957052437.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9910f20c2e---95488941209.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6a52587e5---34426219975.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/813a41a2af0c3e66250609bcedbbd85a/62624476285.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/fakuke.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/wodizekobinitugawumesaxe.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/8720703290.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/81748011574.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ff09a554d---73360837327.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/4a966ca8929d8854b9304c2d666bab4e/negunulixebaxat.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/26a1875d18fce8347d5f6a8d0a510c97/98263823448.pdfIn PDF document text
    • http://marymo.ru/uploads/files/nemilupimugaxuwulig.pdfIn PDF document text
    • http://computerdoki.hu/user/file/57108198746.pdfIn PDF document text
    • http://idaskitchen.org/clients/d/d8/d86ca706a5600d452cde81e4a21b2d68/File/zijemejekikelad.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/e00b7d587661234f1c9df67b26421d99/49976747931.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=sql+multiple+ifPDF 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_off0000d67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 10188 bytes
SHA-256: 816ce718fd59dba7b5b08ae049b6618f11153c6310e618ae795a5c0f692fe5dd
font_02_sfnt_off00010568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10568 17436 bytes
SHA-256: f36ff998cbc6ea657c5906f916d8bccf4ce4d2bdbe71e38f3994fbe097d6157a

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