Malicious PDF — malware analysis report

Static analysis result for SHA-256 21239e374e27afa2…

MALICIOUS

PDF

74.0 KB Created: 2021-06-11 13:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64e92aa04f4f599e07c42fd257cfbaa0 SHA-1: 3e330ab58e4c5a1dcd49dfb560cf6121ad5873e0 SHA-256: 21239e374e27afa2bfaf39620aca8916c1f123d8a1e8541b550d9a4f226fba60
164 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, including ClamAV detection as a phishing trojan and ML classification flagging it as malicious. The document body, though truncated, suggests a lure for 'Apex legends pc aimbot', and embedded URLs point to compromised WordPress sites and potentially malicious domains. These elements collectively indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://synerhu.ru/uplcv?utm_term=apex+legends+pc+aimbot
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/rb1vfmo4n5r9ru622begstrija/3997893593.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817353228db---latuwuwerunopuwu.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/00d2ac5d4b9e654e3d52b3ef2c6058c1/73383906733.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4806e7323---21507722524.pdf
    • http://perles-del-beya.com/userfiles/file/79976411098.pdf
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720ee2905f4---doxabumisonadaxoteb.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073f7e89f360---58243911434.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099d123842dd---kokukovobodoni.pdf
    • http://hzjksj.com/images/upload/File/kumonuposemosogavepoduro.pdf
    • http://isgsrl.it/images/file/foxup.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160aabeefdc3d6---52433874087.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160844be7c0d83---vugule.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e9ce9484d---dofaje.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075a87132508---30828221555.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/40bef12e243eadae61170a0e6a3daaf5/xenuzarigafiw.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/hv6lrvvg8ej9jqck45rp75est4/51640688377.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092026a392db---58023192593.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e26e.bin
11b1ee391c673bb8120d67295845e4807efae4e6b7b70baa041075db0019dc2e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE26E 5496 bytes
font_01_sfnt_off0000f513.bin
0b7d71fede8c0ec223dd8ccf53041a4b28232f469d4e1c986674db5fa4129e52
pdf-font-stream PDF embedded font (sfnt) at offset 0xF513 11248 bytes