Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6ce6db255e05b8…

MALICIOUS

PDF

106.4 KB Created: 2021-09-06 01:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 11888299baff5e0a59930d0fa55ea371 SHA-1: 8e1dc57f03650316332348b7ae564088e2643b1e SHA-256: 5d6ce6db255e05b8427610d8c693fd6d4dd9ff76749df056ce5c21d8f1dc34e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or malware delivery lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f7c031ad5---70231674190.pdf In PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/h7fs96qmi444hjbmqlthjfo0p0/govukogiwidubuverugasemu.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/43723330560.pdfIn PDF document text
    • http://austintownfitch1980.com/clients/879833/File/naxamejugile.pdfIn PDF document text
    • http://vrajacreation.com/uploaded_files/userfiles/files/zopudakuvoweg.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609634bab9824---59914911524.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/38ab632e66147bf4520e24003137835f/futatorasebu.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/99786150504.pdfIn PDF document text
    • http://keramann.ru/uploads/files/12858937131.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a30407e8953---66703747560.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/fad381dc596ac0f725f050dc581ea051/84136497606.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/7d19367b10c70fa1003f7322a44bad1a/wibokusewopuvababofu.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceac814e60---tetomunojutulewaz.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160843f773cc1b---bomuwivalizuvikarovuf.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/pm88u3rq7ivunekattle2b2d62/nupudu.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/gosesukopokipezizirufab.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/63f7bgkkp6c5k5ev20r09i6qos/97159371029.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/vuzozeliba.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/85403308960.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/wovakizowerumegunu.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/gukesoxezixe.pdfIn PDF document text
    • http://www.toptehnik.si/images/73832712983.pdfIn PDF document text
    • http://www.asslar.de/downloads/33886596873.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=common+urdu+words+used+in+daily+life+pdfPDF 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_off00012c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14493 24068 bytes
SHA-256: 6aa32e0bc7a9f9905c712798b77e6510d62fb9e1ac9f4f1b4419e05d63df7e0c
font_02_sfnt_off0001827d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1827D 10892 bytes
SHA-256: 2ca94f8aadadb08bbf0e7e58f39f9d479706b09934d787f3c1eea85f412464df

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