Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0d296cae1c7c67…

MALICIOUS

PDF

81.4 KB Created: 2021-08-31 00:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4562475f50389ca430133f9bfa7ba5c7 SHA-1: fbe5d6e357935f50ee43e6eb955340ca97f783a4 SHA-256: 4e0d296cae1c7c67c8350a3cf2377b0fa3c1725af32eb021e4532532651146a6
196 Risk Score

Malware Insights

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

This PDF document exhibits malicious characteristics, including being flagged by a machine learning classifier and ClamAV as a phishing trojan. The document's content, though obfuscated in the provided excerpt, is identified by heuristics as a lure for remote-support tools. This suggests an attempt to trick the user into granting remote access, likely to deploy further malicious payloads or exfiltrate data. No scripts were extracted, but the presence of numerous embedded URLs pointing to potentially compromised or disposable hosting services indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9879

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://pet-fashion.ro/mm/file/17209365998.pdf In PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/72a3da27f4796cd768a41d99b6d63cd4/genolejizovapepojezuvav.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/6d9eff50f490f95f03d6c30a95f4be36/96430109465.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/gikudaluminerozunepire.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/55308059167.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/59111280537.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/cndtsd1rhi9cecnsm1pnnpn4m6/34721234053.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f674b113ef1---88522897926.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cc4aaa2ef---loxedoluvadukibilaz.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/dijujoxupatirizojuzoviz.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/bevalibativujoju.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/93743450744.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/novaf.pdfIn PDF document text
    • http://dentistturkey.com/image/files/ruvinejijotilife.pdfIn PDF document text
    • https://5udua.com/contents/files/60624362111.pdfIn PDF document text
    • http://1carl.com/userfiles/file/bimukufomojudef.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/622728e9d7ade68a7b74d9b9489c7174/menij.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/jefurij.pdfIn PDF document text
    • http://wjcopy.com/upload/files/27360732890.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/a68619b40fb7d23a1739c8427baec28e/mowotoxor.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/46382988152.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/3860767844.pdfIn PDF document text
    • http://learningkey.org/userfiles/73376232400.pdfIn PDF document text
    • https://fluffy-chins.com/images/file/pajarurezepuwiz.pdfIn PDF document text
    • http://unionnutritech.com/upload/files/12301883770.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/61953080811.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e40141eccff---bazuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=i+see+you+2019+trailerPDF 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_off0000dbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40D 10624 bytes
SHA-256: 744edb8d78a54fab66e34053945a8a1df91de97091c3d63b2ad2bb53a75b452d
font_02_sfnt_off00010ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA6 16384 bytes
SHA-256: c3718d687bfcc45f8191d653f3c1d3687aeadaf60abed28c7ba5dbe7c01d2240

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