Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ebdce14dc0dc68…

MALICIOUS

PDF

75.7 KB Created: 2021-09-18 21:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5e8d8b16bfc17bfc1ef4c44b7c4c2379 SHA-1: 47c248b3063109753bdb4aa6b8d6846d8796d247 SHA-256: 07ebdce14dc0dc683e3999b4389f0a4f63d6e33f4cf6a0ce13c021d84d9e06fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of multiple PDF link farm heuristics further supports this assessment.

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 https://nomylo.ru/uplcv?utm_term=running+man+top+rated+episodes PDF link annotation
    • http://www.jindatunnel.com/up_files/file/83993481999.pdfIn PDF document text
    • https://upaspor.com/resimler/files/segekawavunukul.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/36321655101.pdfIn PDF document text
    • https://terracell.pt/images/file/86923360947.pdfIn PDF document text
    • https://huuphongplastic.vn/uploads/images/files/48558063869.pdfIn PDF document text
    • https://rosanaalvarracin.com/userfiles/file/32782349572.pdfIn PDF document text
    • https://longhoang.vn/upload/files/91031776976.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16132f67b2f11b---kobasumetukag.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/gufinozomuverowagar.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/vutax.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/4348a41cbbe0fd541f183eb1264e6cdb/48059909472.pdfIn PDF document text
    • http://dytac.hk/userfiles/buwimaravaviwugeginorep.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/pijulejiwivurozofo.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/zojisutokegujuvexa.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/93412034304.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/72226128190.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613275d3a5414---kolerofozeparu.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/71627539694.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/34182260724.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380c5f285ec---lujudu.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/fepapolisapewulebuba.pdfIn PDF document text
    • http://chukguwang.com/files/fckeditor/file/27071290149.pdfIn PDF document text
    • https://vhcvietnam.vn/ckeditor/images/files/kapugapideta.pdfIn PDF document text
    • http://megalaserasia.com/upload///73680446867.pdfIn PDF document text
    • http://yyfxsw.com/upload/files/nezamemezatenu.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_off0000be96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE96 10836 bytes
SHA-256: 88c966a0a9bd4b4269d993fc0b2598478f09bcc5a487a0315ab6e48a98162f20
font_01_sfnt_off0000d75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75E 19268 bytes
SHA-256: 104f2316c016fcc4ae9e3a63fde674782cd07e4656ce5b7ff67211794d51ef9f
font_02_sfnt_off00010966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10966 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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