Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c222ace6618bcc1…

MALICIOUS

PDF

93.7 KB Created: 2021-07-03 21:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fe54402a7ffa7157b707f805598672a2 SHA-1: 4aacd144232acd86b070e9672ceb801f29307f07 SHA-256: 5c222ace6618bcc11eabd8ce61a0b5e9e96f129a0ee8d8fb58f39f5fe618d0eb
154 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to compromised WordPress sites, which in turn host other PDFs. This behavior is indicative of a link farm designed to distribute malicious content or lead users to phishing sites. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7099

Heuristics 5

  • 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
  • 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://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/209babe0a5445a32096c84c88ef2c991/befulakuzol.pdf In PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609430897230a---99619713125.pdfIn PDF document text
    • http://atek-ent.com/upload/file/26511731350.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/9c7767bacb20ec727a12e4f41dec2aa8/vutupufiwizore.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b66b3a0ea95---linele.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/r6goi4l5a8hj5u6ldshtpm9da6/16207765676.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991dfa6c9a9---50519110118.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210604_001522.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/33642878094.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/retokitugazaz.pdfIn PDF document text
    • http://artside.org/data/temp/file/metumibomumoxelofagake.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fa4d08fb9---semimevakilu.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7bd3178a27---21050844049.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c59e1b3aacb---puzipolu.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/202152602524235.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abb2891b2f7---83776008240.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/vusewajo.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083821203be9---72258308394.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41b5b34b90---kobagagukozijowijimumugif.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31970d1f24---tewimafovanamidezumiv.pdfIn PDF document text
    • http://mospolytech.ru/storage//files/jutifupagoziraxomo.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a725dd55976---97116271414.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/a09c504e745217eb03352406a0af9f0f/29362464528.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=highest+mountain+range+in+south+americaPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001627d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1627D 10724 bytes
SHA-256: 860835b67907fe427e901fb73c510b7c09154338f459190ac562d188d4c31c5a

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