Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddeb5c4121724e5…

MALICIOUS

PDF

102.6 KB Created: 2021-07-26 21:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5db161e80a69d957a091b870cf41157f SHA-1: 95c4ed4b34f55c5e5a35fa6ce73a66d3fc038b3d SHA-256: 3ddeb5c4121724e5e9f28efaa29a611f00242e964d5f974c0008a7b8709e9cad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e12057d72---jidex.pdf In PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/49jmg8tc0g51rjvtjvo592lk6v/52671903391.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/xesajilazukofewax.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df552e53b0---marufusuluzo.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/371f43e118c1f3d080f2ee152c2fcf47/xexeteledemasun.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/xebun.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/gbpr9cqv934rseso0et92grpr6/29495382467.pdfIn PDF document text
    • http://nhs1968.com/clients/65482/File/vewubewirejaxotukapijema.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/84049520382.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/vuxenureretapu.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/jolavig.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/momarivotejeras.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/c198li33fu29r34b3k2g1ucgl0/bejinoneka.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098af8b72467---14704322424.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16092666702527---8756631836.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/59700456012.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c10bf9ca2a6---53259829530.pdfIn PDF document text
    • https://cartolmania.it/file/bolapika.pdfIn PDF document text
    • https://www.sacict.or.th/ckfinder/userfiles/files/70887458993.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160722bb5f3c9e---88009200052.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/nhogj8opci3pcrioqisp3p6lv0/39603077031.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/d3093256ee083939409d6641f139e179/lowexud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=which+image+is+formed+by+convex+lensPDF 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_off00012cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDD 11240 bytes
SHA-256: 8b39c06b794c5c5ae34921c7126783ae6d6d12a26a16698577625d9a08e27055
font_01_sfnt_off000146da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146DA 17024 bytes
SHA-256: 65bd3275c22f1e0422915eaea7e0d534e1b7daa42a8ae1179c6609e8f62233a8
font_02_sfnt_off0001739d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1739D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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