Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9778ef1977e8c3f…

MALICIOUS

PDF

77.8 KB Created: 2021-09-03 02:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2f3bbae8837521d3dcb19d1ce962f6aa SHA-1: 2efc439abd701ddbb3198c32ce5be16d68c7b7eb SHA-256: e9778ef1977e8c3f7b7c9dc3b7bb0d21a08aced37252973239c3aa8a09579341
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the PDF_RANDOM_URL_LINK heuristic strongly indicate that the primary function of this document is to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/2b753729fea4dcbc28b853096bb6f1f8/88144900503.pdf In PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/28263c48b266e501896d2b7deba7d620/raledokuxosebutosif.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/zumodatujetasupidupabi.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/39125264110.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/8i9f1hleq7od971jafci0r2iv7/rejotuzokigezopufoxa.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/32275332849.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f7a515361---35015069225.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/oslgtum5qjmi6mai065bc1omg5/10496266852.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/80076893370.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/9rp49k7fshag76ssej8okbl920/kezapaduwofa.pdfIn PDF document text
    • http://diakmelo.hu/ckfinder/userfiles/files/67717208790.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/guxikufufazubugoto.pdfIn PDF document text
    • http://mcutech.net/upload/2021/07/file/16271320251688976503.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/xebupikuverasowepuk.pdfIn PDF document text
    • http://topas.lt/userfiles/file/99771828644.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/gexak.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/zawusefuk.pdfIn PDF document text
    • http://juliesfundforkids.com/clients/d/d6/d6f17a7a4e9d342a12f8f8eeddb80b2d/File/66971685401.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/814496cb0317c423d1d1ac94ca8b752c/92224654864.pdfIn PDF document text
    • http://amdind.com/userfiles/file/borerisujeje.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/1479319902.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/49397439494.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=computational+fluid+mechanics+and+heat+transfer+pdf+free+downloadPDF 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_off0000ca86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA86 11104 bytes
SHA-256: 029e38ccb92a4f27bb92e7c464c5021d68466389917c7c71f057f48beee30823
font_01_sfnt_off0000e449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE449 17240 bytes
SHA-256: 038e390080697ac454ad245fea439ac4b647f5f01b90bb47ef6964f3038cd820
font_02_sfnt_off0001109a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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