Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbae1b55aaddba26…

MALICIOUS

PDF

86.0 KB Created: 2021-07-13 12:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 949882bc1baf228b771e65fe45f01687 SHA-1: f40ea2f6f58e66bf3610884888e1cbd6431c1fb8 SHA-256: bbae1b55aaddba26929b0234e3892d43d7aaebd31c1287c5f010a52f61089c36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/33de75723b82005b807d7fdd1251d1fc/35858166214.pdf In PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/1fb05c3439c93c18c14c73307a559481/46624365111.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/u0e96m0ducdv3f7b7r52jci2n2/75673082682.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/b89324da02158c5e664e975d1fb01bbc/loxedibabeb.pdfIn PDF document text
    • http://alkanboya.com/files/file///88189861139.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/48464784788.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/vubijixeko.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ad99fd21d760ee5a0f0d2a4ed63e151d/kujudegubujuwudilesu.pdfIn PDF document text
    • http://stonebriarranch.com/clients/876969/File/277439966.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160a885f57f3b6---38332867092.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/16248416718.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/doveregapafekofeti.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/80046486592.pdfIn PDF document text
    • https://topaldanang.com/uploads/image/files/tawufedunujesaxexilul.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/furesunidufupaju.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/tabatumitajowefuwujukad.pdfIn PDF document text
    • http://15fratrowreunion.com/clients/2/2b/2b18ccadde375fd95e9ac2d5db5aaa67/File/32389518736.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/535f4dbe3bcc9c2331af885180620a2d/21929058652.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2437acb03d---95902222585.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0aeb658d79---fapobolasimununakog.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160accb9061920---vubaxibo.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/62007573196.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=blue+is+the+warmest+colour+full+movie+watch+onlinePDF link annotation
    • 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_off0000ecb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB1 10904 bytes
SHA-256: 95469d776dda86fc9ba6e59c3348f7184123d52dd141dcab13d84986c3d5b25d
font_01_sfnt_off000105e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E3 17036 bytes
SHA-256: 5f54c6eeee28c275e89bff4f070d667f09f86dc4b54ca6e8589ad072d062b08c
font_02_sfnt_off0001324f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1