Malicious PDF — malware analysis report

Static analysis result for SHA-256 457b05bb175dc4a3…

MALICIOUS

PDF

87.4 KB Created: 2021-08-12 15:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3eb75d7fb984db11e04da13d0b5ded0c SHA-1: 2d1c06182b5930c749390efd1af0992f6a7989b4 SHA-256: 457b05bb175dc4a3a707d2ae4a21a443630e0a7c4ef5e2f1b07a68cf7f80541b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm for SEO manipulation or hosting malicious content. ClamAV detected this as Pdf.Phishing.Trojan, and an ML classifier also flagged it as malicious. The document body is unreadable, but the heuristics and URLs strongly suggest a phishing or malicious content distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/752d6d2c8e8d92af4d3778a7809525d1/88661768550.pdf In PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/jamamuja.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/43309555475.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/5059aecfa7012492d73634e563a81a16/68781045515.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/8246212623.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f58481160a---32492699610.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf884ef949---97697563670.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082b3e77ef54---7280881404.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/88104337486.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c48ebde4b---57219230086.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/solizazosubugoduderin.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/k9qqcesb3rcq9ok9p8438mr5iq/fovuranosiguwisasuj.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c1370792---45534265160.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/89546062993.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/bolirunebezesopotepakesa.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bea71b68ac2---74141099659.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/l85vtn17pi24r6ff3tr4krnago/70989949097.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/a33a39f2b23b7f141f6e77475edc9441/teroni.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160e49c5bb9cda---68347270519.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e5ce25acb---67402073178.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/a484022d04e22221e4694619bdd8f15a/74029251240.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a329c0b6f6d---99097546945.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f732057304b---41801795701.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7c20f22a8---fanunij.pdfIn PDF document text
    • https://cochleartudaskozpont.hufiles/zatorejiwira.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/95489430000.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=ejemplos+de+funciones+lineales+para+graficarPDF 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_off0000e9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001020f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020F 11076 bytes
SHA-256: a3a8be6613707df0131c1471ce94e7633e24903d2fb806af183a40e3fc04734f
font_02_sfnt_off00011b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8E 18776 bytes
SHA-256: 73a708ad88b2bfafc1696b283fef43522e5bb7c96d36c7be6b8fe11fe3802e1f

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