Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb636395fb45176d…

MALICIOUS

PDF

77.8 KB Created: 2021-06-29 03:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d77f3d0962622c848184a2fa6bf12b4a SHA-1: 7d45a8bb322ceac75fc118f6b1e8ae7e9c74b980 SHA-256: bb636395fb45176dc10e14a6e4a16076780b3aa8a21baa99ff2d74823efd315d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, directing users to various websites, some of which are hosted on compromised CMS platforms. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

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://angkorphotographyguide.com/userfiles/file/97986423979.pdf In PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/khiptr7kssufmmnbq36pcckl52/94574284317.pdfIn PDF document text
    • http://xinyuemu.net/assets/202106/files/20210603062729240716.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f60d25c87---49998216851.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092317c260d0---numovafakexulakepabejo.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a86874c5956---25446423460.pdfIn PDF document text
    • https://2acontractor.it/images/file/babepelugu.pdfIn PDF document text
    • http://tipiland.net/upload/file/82988554258.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d556a6af568---dugax.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607646d51f710---tutitujedajalopasumuz.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1cfdfb19ce---50837959332.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/54399396154.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b414fa6070b8fa819582106ea2843b89/kiwomiwunim.pdfIn PDF document text
    • http://fruitvita.com/files/files/71248303139.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/2148624545.pdfIn PDF document text
    • http://compsult.net/userfiles/file/sedarunefaj.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cec11749fe---tasodelumasazapaxisaji.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d87ed8801---94967130776.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/96501789549.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a6201bd32---70438042915.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/98657511522.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c511619a064---vepugizasutunux.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/pawazalozivaxuxoxewuv.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/4f3bd7b22d47e641bd622aca18932437/natatofezimogugezabovig.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/29759819924.pdfIn PDF document text
    • http://bhsclassof70.com/clients/a/ac/acf0241a72c9eb28a719a759cf8a4748/File/33569349467.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=low+blood+pressure+and+ringing+in+earsPDF 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_off0000cf5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5E 16212 bytes
SHA-256: f680bd9326c08749295649391cec8610418542c1ec65a738100403a53fd30f3f
font_01_sfnt_off0000f919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF919 10752 bytes
SHA-256: 6671c5654897706141992d47973133d1c31b95022d45718e590e5bdddc912532
font_02_sfnt_off00011180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11180 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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