Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7e06ff902c9c2a…

MALICIOUS

PDF

84.4 KB Created: 2021-09-01 12:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 595e93c5bafb6e37ac88a91c1a7afbfb SHA-1: 80bd96c8c44f34bd1826b2938dcf8734a1652615 SHA-256: 3d7e06ff902c9c2a38cf3553ce2147a1241e63e3692481c94872a33b8df9ff23
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to multiple PDF files hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of numerous unknown URLs indicates a broad attempt to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a523dce8185---tekofigoterekegis.pdf In PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/15843734370.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/jenako.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/43206360268.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085cbfe16c8e---80014842511.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/72110098524.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/88825224260.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/093e668777b4699f511e27ee43c1cda9/17445512031.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/wiwujo.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/77227393209.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccdcdda92a9---27581104269.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102c780c3f32---tiripixot.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729e5c8cef9---95437712167.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ece2d158a9---jovutefali.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/1450866863.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/m0cc9lqh2roo5kpenubue5e430/newilozuribuvalizifuxojim.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090066b58c92---77959415831.pdfIn PDF document text
    • http://fluidearthconcrete.com/userfiles/file/32704804092.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/71468859670.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/4288353bf3d53ddc5e50f6d095ad8456/sanonidudalidemunewi.pdfIn PDF document text
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/28177097556.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/4870223191.pdfIn PDF document text
    • https://kfmaccounting.com/webroot/img/content/files/91088897064.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/73785de59fa9b43f0d50a7b44639d5cc/nomamudifugosakizit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=direct+answers+comPDF 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_off0000e83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83E 10432 bytes
SHA-256: 7921937d390e4ed5b67f805670bb272529f76acba876b18c9b653aba03ddda87
font_01_sfnt_off0000fff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF5 17116 bytes
SHA-256: 9c98c15032557a04a4e5c282e261d060748171831c3859d1a9a6a71f56e6af6a
font_02_sfnt_off00012c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1