Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf581118d3eeaf3…

MALICIOUS

PDF

85.2 KB Created: 2021-08-26 19:35:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8d0c30baece2d5f516f2c43c47a78c31 SHA-1: a767958f808017fcba977ae5048f9119e11f6156 SHA-256: eaf581118d3eeaf3d22a4a1019e8b822671aea70c3edab3299c2c68ccb521c29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous links to potentially compromised or disposable hosting sites suggests an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the nature of the link farm and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://garnet-medical.com/userfiles/files/39015752330.pdf In PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160955033a9bd5---44029930670.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/vevepiribogasokovo.pdfIn PDF document text
    • http://slhs1958.com/clients/18590/File/14388091622.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/7a661b69503a22ee75136b9bc77637db/wopuwameworanefudurexati.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/97125967826.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1627959025986195702.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/sivenefefivoru.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/pawaxirufa.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/tegabewupovoxidifa.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/82067635955.pdfIn PDF document text
    • http://bhsclassof70.com/clients/a/ac/acf0241a72c9eb28a719a759cf8a4748/File/vefal.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/99005100786.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/33da6e24d19903c5d93e6e450d2101de/mazofiluzam.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4f846a0fb---xepitirapu.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/tirazadijujukogu.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c39a25037c7---nowoginegofebaruxakafe.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/babekefi.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/53m21lrdvpgl2urstri59b2f4f/20550263240.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/wowalofijukebaj.pdfIn PDF document text
    • http://soupworld.de/upload/file/remifitewot.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/58046230289.pdfIn PDF document text
    • http://rapet.hu/files/6027490020.pdfIn PDF document text
    • http://maihiendanang.com/uploads/image/files/mubejofadolujezuso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=excel+task+tracker+templatePDF 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_off0000ed40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED40 16480 bytes
SHA-256: f18e21eed10fbd85e12d3b91ce84b767a2bc3e9a8f4951be4d4f12f6c20ae2a2
font_01_sfnt_off00011801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11801 10396 bytes
SHA-256: 50236da33d8980d965cdefab18175d8ae017e1ac11793bf27ac5d7454a3ba72f
font_02_sfnt_off00012fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1