Malicious PDF — malware analysis report

Static analysis result for SHA-256 beaefd6ed8d43102…

MALICIOUS

PDF

81.3 KB Created: 2021-06-09 22:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1cba8ea7e91b4a50c1182d3ad96e9379 SHA-1: 9caa2bce17d645fb42332bfa508fe4f9595c297e SHA-256: beaefd6ed8d43102d5aa3b18d332554c32748f2d1b5f621f006e6758e3bbff0f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous links pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The presence of external URIs and compromised CMS upload links indicates an attempt to redirect the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ketchas.ru/uplcv?utm_term=redmi+note+9+hotspot+password PDF link annotation
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d137fccdc5---jemoximoxegiw.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/da7134e71fef143ff92b2c1ec304e6e2/noduma.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098363e48079---pigopawotonugimitusejar.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/xabupekegupa.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7961c46c6---23157269196.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210530131058_1573477403.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a633af62ef6---37649672295.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/8337d0d071b32d61024b9a04b5d171a0/gipajamuwoxaremekovelom.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/vaxofumid.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce657b7329---19976407369.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tazin.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a96a7bc81f---97656514542.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/hns535a8nijem1isolhg6cdtla/kesixavinafafemaxisab.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/ubkpagrvaah47lv1m0gnfojcq7/51577889596.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/117808260.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/c56d01b520b453aedfce077ec01b4940/pewuvetirulu.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://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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA33 5208 bytes
SHA-256: e54d43d0e23ef51a4547e9ed026c58413af350d8528cdffc9a9bf597d82b6cc0
font_01_sfnt_off0000ebc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC8 12968 bytes
SHA-256: f3ea07dcbacb76641ed1ee6506280c2a66a8da4168689dd9971ee28116610bc7
font_02_sfnt_off00011576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11576 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330
font_03_sfnt_off00012a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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