Malicious PDF — malware analysis report

Static analysis result for SHA-256 232bd85324174a97…

MALICIOUS

PDF

80.1 KB Created: 2021-09-02 01:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f0a8f199af21d7fb4e9249d26fbdc5c2 SHA-1: d745d0335df02f5e6a1e47e79b9d70b2adad77fc SHA-256: 232bd85324174a9768712ef63303e2d1300bc4f5e8e2f3386e817c25f8e47ece
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://orgue-chantepie.info/FCKeditor/upload/file/mizirupamukazavatabur.pdf In PDF document text
    • http://anquocrealty.com/uploads/image/files/binomomewabupejikimobij.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/56s0kkc61ccjjpe53dqvc6hjvn/moluxetegudezoweneraza.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/xemiselamamodubesinivubot1627049007.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/qr80nodsa7dk5mdprd7k1f2foa/majezatinamuluzove.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/xizal.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/015cb993e44f6cfb4d6cbfda41f6c92e/14800209363.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/lifalokuwifuzorijujek.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/hgfr4lj26es2lnt87k0b7o0of2/41590281856.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/22796325246.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/84239591573.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b435d433a9f---57257684596.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/depuxuvizix.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/xarojixedis.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/90997584442.pdfIn PDF document text
    • http://insureacompany.com/userfiles/file/tipokiwipimujoxemavow.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612bb167e8631---kanubafowu.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/f48000de59b6a649120ff60f9a164081/gugakezi.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/f99d66f870c70f17c3f15fcd907999bd/98784007524.pdfIn PDF document text
    • https://actor-conseil.com/files/file/rojirikewokivipo.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16109d551514b0---13862528897.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/qbd5595ajc1bo0brme7ohsoemu/23213892667.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b4a5db407---lojiz.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/34caf9eab5470333facc56720fa4255b/dokod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=jack+nicholson+reese+witherspoonPDF 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_off0000d3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CA 18016 bytes
SHA-256: 94302ebbb8da34063a00973122336679a36142290027e76af623efbd4e0829c4
font_01_sfnt_off000102b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B7 10640 bytes
SHA-256: b81d527b08047b5019c1f3472a64a2bd115183031ee40ca2d29ac3fc1665c82d
font_02_sfnt_off00011b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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