Malicious PDF — malware analysis report

Static analysis result for SHA-256 a353f1e7460bb0f2…

MALICIOUS

PDF

69.5 KB Created: 2021-09-04 20:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1cf9fdb6e8a5daa9cfdbf8edee7639f4 SHA-1: 9eb6190e962e51dd8aa219e96eb0b76ce64bda7e SHA-256: a353f1e7460bb0f20a693c4fcac0c0c30a42de8395fcc7d81ebcec91020d25a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm for SEO purposes, likely to distribute malicious content or phishing lures. While no scripts were explicitly extracted, the presence of numerous external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ced377cdce---luruzal.pdf In PDF document text
    • https://pmsp-me.com/userfiles/files/66420102464.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/c85181b8e04349cee24ded0bccc86b24/kifijamovalexuriguzeg.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608864c444a79---minesovexomub.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/63404355594.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8da1d7cbc---tujozefifojidimod.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16076496e36eaa---99249276454.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/vezufudeladitusowalofe.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/7bc866ae0b8ed40505c598e19e6ac136/64787129924.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c79e1d2091---koxatagugu.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/pabivesujugadujunapukew.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/91900899503.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/3144c19366f334d8c04a6d4c307ce629/81717285844.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df1ace7327---25863806459.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/dapazur.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/c63099da1943c2603c21b62792f27f9d/19448008257.pdfIn PDF document text
    • http://vssteel1999.com/ckeditor/userfiles/files/supujagizepokatu.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/wemokafubigogodojo.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/zorofagusabatezovesob.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16085c736eeee2---fesumesife.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/84775294597.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=distributed+database+mcqs+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_off0000b140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB140 10896 bytes
SHA-256: 17009f9118b833a4232877845b6849a0187675d101a1045a318e5271960e8443
font_01_sfnt_off0000ca1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22D 15376 bytes
SHA-256: b9a2ab753d03d0d0f87e188c9b013459d8b9974488ee271aa9965641a7487f04

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