Malicious PDF — malware analysis report

Static analysis result for SHA-256 6163d69e5a28395e…

MALICIOUS

PDF

84.9 KB Created: 2021-07-02 19:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 27d54ddfee8f220b4509cf0a4fdb1713 SHA-1: 33436cfbea3e08af113e90e2f83576a00b103339 SHA-256: 6163d69e5a28395e3517700dda334952dc1be4473b6035e7abc8dbf64dec0895
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest this document is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://krisoc.ru/uplcv?utm_term=the+haunting+of+alaizabel+cray+pdf PDF link annotation
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/74b69d537b37d474d61bfb3a2d804f49/21854406441.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/6jal8oe8d17r5u1164oc1gq17v/tazibubukujewuxewujutilu.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/3450654379.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/vedodabu.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/550de1f001c84492c08de5acb6e5fad1/92212981484.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e5e7a8719---bipobinop.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f669fe5d0e---kamuzaboruger.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/bidulugebi.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ee729dfda---walitivizukod.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/65188gspus77a8o769387otjnl/84541619798.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b05640c96---vaxulubipewedimetu.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/7106e3198dcb89db26590f0e450a081d/vunosesizuvinikilemanavel.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944c498f3b0---fugemogosapozetopex.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904c2ee1f5f---651940963.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/juxavekezazokuvivizasigib.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/91722716701.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/a1876c7012727d21d0f4df49ad7f424a/72900670590.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/10c17a0eb3ee38923d3a93cdab3ab2f9/4713399917.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1c5044e41---dofovawurixulajagexeros.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607141b585f04---rajup.pdfIn PDF document text
    • http://mopron.ru/upload/files/fagovofix.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c7840dd25---sigemepubar.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://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_off0000e814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE814 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10026 17036 bytes
SHA-256: 75b40ea3b8ee7e841f63b5d323afe8e19930a04b619d245e07bef32e5b90eb0d
font_02_sfnt_off00012cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD9 11108 bytes
SHA-256: 68749d780152c6532f4eaca4afddfd118ea3c023ad2f0f054dd79a4b982a0037

Open this report in the interactive analyzer, or submit your own file for analysis.