Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7229cc05b8d6d86…

MALICIOUS

PDF

68.2 KB Created: 2021-09-17 20:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 314674cdf4886f5d14865b2c7fd140ee SHA-1: 3cf3530d86f3020c201920dadc16e3a9b557530b SHA-256: c7229cc05b8d6d861fa603ced36ca624037fb2196d2a6b9df8a75a439b475d03
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded JavaScript is likely used to redirect the user or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=aplicacion+android+para+radares PDF link annotation
    • http://funkyspa.net/ckfinder/userfiles/files/binevokuburevaju.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/xepatixadope.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/zibopusajodukufofifog.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/56610378196.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/dabubumij.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/38160855565.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140839bd6c9c---97564505467.pdfIn PDF document text
    • http://gongin.humenia.com/upload/userfiles/2021/09/files/210912025934.pdfIn PDF document text
    • http://mcdanielz.eu/files/file/mebovezex.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/d859e8ec6e2a3834e6e175ffd297e3ba/75757308387.pdfIn PDF document text
    • https://at1apigroup3.com/contents/files/64001511983.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/72400986897.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/3956735735.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/fadik.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/nagojofapuginurul.pdfIn PDF document text
    • http://zkqzl.com/uploadfile/file///2021091106331553.pdfIn PDF document text
    • http://cocoon-source-harmonie.fr/public/file/7718686327.pdfIn PDF document text
    • http://materialdeestudo.top/userfiles/files/6683353268.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/02c8d668bdc61354cf179b40f8acddc1/sawepuruxoxevavozoben.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16142b2b03ab34---nemokalavixubat.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///potafimalipi.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613894a8b4f60---rasosutulu.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/70297418939.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_off0000af67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC779 14548 bytes
SHA-256: 8a5d4bd737cd34da0a2c8eb98a810d94fc377d717d908dd1ef376f7a217d58d0
font_02_sfnt_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 10392 bytes
SHA-256: 0a3f68950afdac274972acd87eeb48756a24065cc6fd706b066b34098cb9ae48

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