Malicious PDF — malware analysis report

Static analysis result for SHA-256 77fdf36456de4a72…

MALICIOUS

PDF

84.1 KB Created: 2021-06-30 08:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fcb10af9c151b8c03470a8c18cab7263 SHA-1: c76712cb7147f17a8bf6b0d6fb8aeb1ce93fb237 SHA-256: 77fdf36456de4a72930cb18477046b29acd150416edb6f0c53904966dae097fd
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress installations. These URLs are likely intended to lure users to malicious sites, potentially for phishing or further malware delivery. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160d8cf86a79a7---dovavifowovuzugikemor.pdf In PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ed03532d2---fowawufepubifuredob.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4e9d5928b---9142417683.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/3qaacfv90rrp8r1fjofl1nq57f/jilajosuro.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bifelofuxiwupesakivibur.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/89222011270.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/66322200713.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/6pnd5tmc1cuikt1n09b6o0i38q/40743800146.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/r1ur04qiigcgdm0mes0gktl3q2/befaridizepiwuvazapikud.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/28744016024.pdfIn PDF document text
    • http://abwva.com/uploads/files/1777475525.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/8dd5c611978baeaad272ff20487da871/bolulurabafujexezutavudog.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ad10253b7---rimepisemazu.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/0e081ft1ors5k9kgsas61h23o6/wawunurup.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607009229dcaf---48785487524.pdfIn PDF document text
    • http://poorclarescork.ie/images/jonumivakidixamebigu.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/46278034065.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160903ea995bb3---63248892795.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/d29136f91902c4503a0c49b0cb53497c/8016185122.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6d9d04bb3---33667021839.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/pb3ijj4skcsunl8e4aoo9rojc7/35686992100.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+produce+powerPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B1 10112 bytes
SHA-256: 05b3feba6991113a02354543391f8d55e5b1e87477c561dd409eb71e8eb78d92
font_01_sfnt_off0001005d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005D 16748 bytes
SHA-256: 7b58cb6bfba124c081857a20ce8bf7e20b23ac2b60f343341baf6faf82599781
font_02_sfnt_off00012ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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