Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fd7bc75cb2dc51…

MALICIOUS

PDF

77.3 KB Created: 2021-09-06 04:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b53f8d3eead7484636308df5f4e86b17 SHA-1: 9e407ee2c3b93806294755e0171a66aa4f32e44c SHA-256: 49fd7bc75cb2dc515e0b0cc6b632faf25664c9d03af1c3a794454d3e2ca6269e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=project+manager+competency+development+framework+third+edition+pdf PDF link annotation
    • http://pusancard.com/userData/board/file/60888629506.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/kopokok.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c553f0d569---mikoguzija.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/d8f561ec09c9787e89ef600c8146c84f/84620930295.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161148a6a7d897---fesedevulidoturuxit.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/dedasulubijobid.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/96716980522.pdfIn PDF document text
    • https://chptravel.ir/data/file/junokuxekopoboxebos.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/30264341951.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/fm4f12f61s4k0cmmf82vlb0n3v/78541214928.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723ea4cb0ef---62518960277.pdfIn PDF document text
    • http://jianianhuayule.a9188.com/upload_files/art_files/files/20210830_122930.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/2591890085.pdfIn PDF document text
    • http://teraval.cz/res/file/bukekefuzegikekewetipok.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52467cab91---85542927354.pdfIn PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/talufasuxuxenufowetobevim.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/2gvbnptgu4bhc51s6dlgqeob02/lovikinebojipexameruk.pdfIn PDF document text
    • http://www.celso.org/download/92253405211.pdfIn PDF document text
    • http://vertinu.lt/ckfinder/userfiles/files/jifubotifuvoxigifako.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929d2268130---87978139956.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/9681ae3358ef0a6f7b18a2a8041e3090/24057306238.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/877f2d1c991bc3265fb3177746639688/mijavipazidozimusaxibilu.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129e5156fecb---jikumijojasexepe.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_off0000c6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CA 16760 bytes
SHA-256: ce4925d9b396b15b45c858480947b16d72c39bd076bef809f7ca68a722c33f27
font_01_sfnt_off0000f223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF223 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3A 11388 bytes
SHA-256: 9e095abd79825a6b0796cd2980920df07966f328f25398286dcaa69f6cb4705f

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