Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c64f0e567a4e11…

MALICIOUS

PDF

86.4 KB Created: 2021-06-30 05:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe5feb950be4dadd4c63497e752bbefe SHA-1: 6bd9b897081df13570187295080d93bb880c81dd SHA-256: b8c64f0e567a4e119fea8a03ec62e65b9aabe38dc80ed88200a4c0cc38c7eb73
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many hosted on compromised WordPress sites, which are indicative of a link farm used for phishing or malware distribution. ClamAV and ML classifiers strongly flagged this file as malicious, specifically as a phishing trojan. The presence of multiple unknown URLs suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50e3b5e24e---44774047604.pdf
    • https://coonvalleycc.com/userfiles/file/lamobajuzodur.pdf
    • http://pinturasoltra.com/images/slider/files/mupigafarelebakukoburuna.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc99eb9126---sazoxubesi.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/23b876475042b6616e0c05c67741506e/30992361982.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7419e9c65---1346096020.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608f03eaeb85a---kufavamakas.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/f270c1e92e4fc002a649efbe9271f044/820461214.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/6478b2a9872735fd28eb0aafc60954de/dujopasiwabepaboke.pdf
    • http://clinicaveterinariailmarzocco.it/userfiles/files/15173759713.pdf
    • https://webmenuplus.com/images/file/girebuxudulapokolupesa.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/annb5vabkpmmmr5u79nj23ln1j/41981345735.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a358f2311---78359605505.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a111d3b7b56---woxonuzokituxowelokuleku.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/r1gkhlcn2ahee8hvv5hue2ihd8/23175970940.pdf
    • http://www.deco-interieure.com/userfiles/file/52326234241.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d924d72856---kizojetomajafezo.pdf
    • https://chiuman-hk.com/images/file/95005810115.pdf
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/20f006717c87a5817460bc1d6fb3e253/11324672752.pdf
    • https://aymsoft.us/aym_image/files/82617994469.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/1c99d52e600ee992edba247d8e5dd9a1/2950604274.pdf
    • http://asbufestival.com/uploads/FCK_files/file/nelujixuwiwebanemipevu.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/238a27dgvahbgs0dadbk7avu73/64013829938.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/98eec5c8c1c875878a0db68db278689e/1421080918.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+build+an+elytra+in+minecraft
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebcf.bin
cf63a0799bf85fd79896811147a5d9c529f556d02b00704920bf579f2110e561
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 17816 bytes
font_01_sfnt_off00011ae3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE3 16792 bytes
font_02_sfnt_off000132fa.bin
1fdfc6cd10922b59eed855e88525ef278323c93c5702af851d13f400a43417fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x132FA 10900 bytes