Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7bdc472575028d…

MALICIOUS

PDF

75.8 KB Created: 2021-08-03 06:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5e135f9a2b99f0b65215a87a15a7b0e1 SHA-1: b7af61e49f7d5b8e5564803d4fefca813c2fa516 SHA-256: 9b7bdc472575028d778c92b690315ffdc9eff9e4e826c859c887558ed5cdc2e4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to host or distribute malicious content. The presence of a 'download' button lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=in+your+opinion+why+does+rainsford+choose+to+confront+zaroff+in+the+end PDF link annotation
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/derifusukitovewidu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62cfa271b8---lixukagagetuna.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/83061147094.pdfIn PDF document text
    • https://groupunsur4.com/contents//files/45700447762.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/e5f8ceb3075a278612f0aafbb4f588cb/dujubokavijobesiritutuz.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/89141482073.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/9sqhsfs7007ruo0mo75eruade7/joben.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/974120cd849b1695d457e19c3f3056a2/16657457452.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/xetizagobog.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/19112468589.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/gdnnp0c8ssv1ramqvjk9vfvs72/jezadumafata.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/3992665698.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/53bce77fbd24936fdd835ff40e2c6be3/jubuzunabunowobazipike.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609631ac9416e---44599219947.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021071605543473499.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/oe5riu7mv2sb2qk3j81ov0nud1/bonudorigabedetulekojotig.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/78607852714.pdfIn PDF document text
    • http://cukrarnakolbaba.eu/obrazky/files/dulesividegab.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/55720263422.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/33496863088.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0285ae727b---dowoxip.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/zujapita.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_off0000c21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA35 10984 bytes
SHA-256: f793f05409e2a2f3572266acfff4787b1bd943141c8cfe79b2205c26caf53f39
font_02_sfnt_off0000f3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C3 16520 bytes
SHA-256: a92ae42ceae65f8eb6932219121fbf1c9b2b69aae4b2459ca3ecc1e903a21cd0

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