Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd684ee3bbcb159…

MALICIOUS

PDF

71.9 KB Created: 2021-09-20 08:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 218924baac6773588ce7c3484fcde6bc SHA-1: ba157516001a8f4fd6fb6eac5dcd4ac86188dd46 SHA-256: 7bd684ee3bbcb159b41dec2a4c93d1101d72ab14f272c52d4438fef95cb65568
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to other PDF files hosted on various domains, some of which appear to be compromised or disposable. This pattern is commonly used to distribute phishing content or further malware stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://na3.it/misc/file/94994435321.pdf In PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16135bb6612845---tivigetizataxirotibapaxi.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/7463184463.pdfIn PDF document text
    • http://salespate.com/userfiles/file/11394507742.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/16960551405.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1bdbc28188ff85bd4b975897d152481e/60951255206.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/12403491535.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/62497841890.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/37547320207.pdfIn PDF document text
    • http://delve-cr.com/uploads/35491245452.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/77115869818.pdfIn PDF document text
    • http://edallyshop.com/upload/files/nefaf.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/lavezafipemaz.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16140e32e877b7---jutexupamabi.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/In PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210901021452.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/vovewekobedelizedujunoz.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/votakaxafomototupup.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/zafeka.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614081e25e107---ziwegixawomanibugeviwip.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/98890972327.pdfIn PDF document text
    • https://trieurodata.ro/images/file/vuworoxarofenevesafixis.pdfIn PDF document text
    • https://motiwalainstitutes.org/userfiles/file/12618206084.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/13412387821.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613441f44b003---27177418746.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=zapya+app+download+for+androidPDF 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_off0000b8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D7 10256 bytes
SHA-256: f3860c124f576b95dbc18aecf05737a92b940433ef8e6b96d1da05ed1e636a68
font_01_sfnt_off0000cffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFE 16472 bytes
SHA-256: 068a424ef652e45c118d376878d35902098ea56e71cb2e930539c4a48556137d
font_02_sfnt_off0000fa05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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