Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba8a05bcb7ce2df…

MALICIOUS

PDF

82.5 KB Created: 2021-09-06 06:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: f7e770c5ec2f1be35821e2161ec877e1 SHA-1: 3f06b738d75ddde0e812ee54e4afa067e08a6508 SHA-256: 2ba8a05bcb7ce2df698ee80cd059c238b0ef6bc3f438c05ac69005936337b360
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://eszixv.hu/ckfinder/userfiles/files/mufuwenikezo.pdf In PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/65a761d9af7460b47db6a54e135df82e/sevobarasekada.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/996r7pc0t7j8a06ctkld0mp1lq/xuteme.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/7642359533.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/fudevotumivagika.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/96651402197.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/wovuritebozivenuwokaxafe.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cef73020ee---1037328581.pdfIn PDF document text
    • http://suleymanporoy.com/img/userfiles/files/bofososixisuv.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/museradet.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/3a4c3cbfee676c8ce463847d0ac5df74/dilaxexodegezezelib.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/dixefaziwewowunobi.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/43867821021.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/gulasixebazusi.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/navoxekorabew.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/42291256708.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac306f91237---45159581376.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/3d3272f51bf6d428cb1545c4bc294641/90014118578.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/7847163438.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c10bffe5c6a---2760891644.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797b6f723bd---47913065884.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/4370338119.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/cd0f7b857d1fff55a02de0a68dbf5ac1/denojudikexej.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/3e539a820038e4f3321743ac0dee0707/gisomofupifujakareta.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/zodesulexowam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=catarsis+concepto+pdfPDF 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_off0000d5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C3 10596 bytes
SHA-256: 51b89c5993abe6b5d5bc7a71f8c1a1900137b31e605f3b1ac812c62731e5145f
font_01_sfnt_off0000ee1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 21216 bytes
SHA-256: 215e106512ee85bedc067147d0b7a063c53984432b29312ae2bc6e6c131d64a5
font_02_sfnt_off00012477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12477 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1