Malicious PDF — malware analysis report

Static analysis result for SHA-256 417272e058c74120…

MALICIOUS

PDF

79.9 KB Created: 2021-09-01 07:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 55b7254d306ff05777c93d71528e6323 SHA-1: 2c9de029b7d6ecec60321f54830ef7aef7de372e SHA-256: 417272e058c7412021b574520e1a391dd6f373ebc76a462d45def5defd182124
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains numerous external URIs and link farm patterns, suggesting an intent to redirect users to potentially harmful websites. The presence of compromised CMS upload links further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://pixomot.ru/uplcv?utm_term=nicknames+from+p PDF link annotation
    • http://growlink.biz/userfiles/file/89750297824.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/4b234f02853f9bad013a2189d7677597/82810661106.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/48630073700.pdfIn PDF document text
    • https://zop.bg/webroot/img/content/files/lererim.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef0e5b4a21---sazemag.pdfIn PDF document text
    • http://biblioteka-belzec.pl/upload/files/71848688297.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/gu6p2m1513s2s8l4u5v5svick2/suxoba.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa31afba3---33996327404.pdfIn PDF document text
    • http://whs1979.net/clients/65916/File/bowama.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/565a2a03fd125251494ca730d029d0fb/31363475450.pdfIn PDF document text
    • http://hanifeugur.com/image/files/25657906282.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/55501333453.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a56ebce8d---kebuwom.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/rixadap.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/41408359021.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c965b7658---sipalosani.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c3eb4a12372---tifogekureporugabefu.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cba87ed090a---14901420514.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/87602955642.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/72651467234.pdfIn PDF document text
    • http://popmetre.com/news/files/50520638763.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/55758481799.pdfIn PDF document text
    • http://pronobile.de/catalog/file/bewapiferubexejexovak.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/71282072925.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/rilumarese.pdfIn PDF document text
    • 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_off0000d6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB5 16816 bytes
SHA-256: e4411baae48990d97a77e2731e81a099179ae5f7118d87f1d1d679b218e67c16
font_02_sfnt_off00011964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11964 10564 bytes
SHA-256: 26243d3571b01c5195cf37731aec7733bf6291a3fa22243dd199c45a892cfaa6

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