Malicious PDF — malware analysis report

Static analysis result for SHA-256 696bd482880f23a8…

MALICIOUS

PDF

83.1 KB Created: 2021-08-19 01:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 711480b3a4f71f863e28b262bedf41b5 SHA-1: 8fc19b8c9bd20a90415d5db2d3859730cf4a7208 SHA-256: 696bd482880f23a803d4f9acd7f92dbf1a84b4df898d64ff350f329bb7426217
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites or raw IP addresses, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://smidgel.ru/uplcv?utm_term=how+to+download+local+files+spotify PDF link annotation
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16072bbd95c2fa---22727582599.pdfPDF link annotation
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608785e6af7b7---84147420979.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/vnigmeafeocn8u6fiect59vp93/fuvevala.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/86844315305.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089a7cb427ab---42841371546.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/3405914581.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608477322ca76---kosabigozuziwagamufaluf.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16112d6a199d8d---36525267461.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/gosiwuziwunosi.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160bd35ceccb7f---tesupuniguripasekivotit.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/92382554404.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/zowifabigerelojawaferake.pdfIn PDF document text
    • http://afslab.asia/upload/files/fekozulufu.pdfIn PDF document text
    • http://phs60sand70sdecadesreunion.com/clients/880504/File/nizetajufemowifonamo.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/d13c903b2b175178c7fd2d5fab4a692d/derivijalebamasef.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/4625759367.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/247005b6b17090250c075a1756f0a705/4514589763.pdfIn PDF document text
    • http://mkbeauty.vn/luutru/files/xelufegadokena.pdfIn PDF document text
    • http://christopherdallo.com/file/98027025997.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/97803897105.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e53259d4edd---3873936758.pdfIn PDF document text
    • https://rmduncanrealty.com/userfiles/files/dikibep.pdfIn PDF document text
    • https://soft-print.pl/app/webroot/media/files/13650394510.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/benokenenapijokupatam.pdfIn PDF document text
    • 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://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_off0000e64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64B 16312 bytes
SHA-256: 1910cbef86de449d019628c3d18677d7db2e10ee634dcecd5d32f6f86c51d7d5
font_01_sfnt_off00011060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11060 10704 bytes
SHA-256: 072c59bad5b140460082a17e4b70b1c9a576ab7e37e711c15d193c4895c0cb7a
font_02_sfnt_off00012918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12918 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1