Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de16706ce0ff994…

MALICIOUS

PDF

86.8 KB Created: 2021-07-13 16:34:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d0427d594a707961def01b986da61ab4 SHA-1: 5441b978f35e00b7797c504bebec24e2f893dd12 SHA-256: 1de16706ce0ff99419a0b3e0667603ee7726faa5fc4a8ea4bbdf38def131b214
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to compromised CMS upload directories and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://ecotranslation.ca/upload/editor/file/65034333000.pdf In PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/650060cfea53b7166275f94d3d16cbc7/21699511224.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714dfeb1ad7---35687069077.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/25086598260e95c127d1b4.pdfIn PDF document text
    • http://maihome.hu/admin1/file/37011051864.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b222c03cf23---89353183084.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/piximu.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/30521186533.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160793ae8173c4---bebugodabutaxokafil.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/40dece58d0c37985fcefb09dc6489b14/foluxejodomos.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/d829ad44bc2dfcdc07df629e9b03452e/74950307388.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/luxirabudujomolixawal.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607068635797c---53699564890.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/8177214084.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/be86b5c55028c31548d490e2c1cc5e01/23682690313.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/72542904078.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/37256489713.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/c0b87aaeba5eca6fb91de40bc6c5e92c/mipiwoxafisanixenag.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/c4495806c4a3cfcc229d1e9c4c6e7b29/66327090175.pdfIn PDF document text
    • http://nhs1980alumni.com/clients/878257/File/10729155275.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/fixab.pdfIn PDF document text
    • http://alexsrmenchion.com/clients/b/bf/bf5401b25fe3457642f5a6f1150d5537/File/93837972657.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/60956062046.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=scripture+about+jesus+on+the+crossPDF 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_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 18520 bytes
SHA-256: 0ce83b1dd5eabd987ce83583a1742a3423da62fc5e499a1c0af1c32e70dad3f9
font_01_sfnt_off00011cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC1 10868 bytes
SHA-256: 77f0ffbd0f6732fc4f22748d517eb312c0bc08c9b2fea200f827f5ad5c48437c
font_02_sfnt_off0001358b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1358B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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