Malicious PDF — malware analysis report

Static analysis result for SHA-256 062a9a49dd5840f6…

MALICIOUS

PDF

85.5 KB Created: 2021-09-05 09:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: eb1db784f04c915a5f187a6db3aaa4d3 SHA-1: 39820cf175045df22ece37811e536b1c3bc1c2ba SHA-256: 062a9a49dd5840f66fedcd3ec42e3dcbd961f7f2451b0032fbdf15234283f389
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be part of a link farm hosted on disposable domains or compromised CMS uploads. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crysiq.ru/uplcv?utm_term=modifier+pdf+iphone+gratuit PDF link annotation
    • http://drivingschool-brno.eu/files/81017305708.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/43409923956.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/babuponuluwefek.pdfIn PDF document text
    • https://cecprint.com/images/file/detixojobe.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/72385890573.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/28263367079.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/dilogazajeganilukotof.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b00e57a32ec---57148882074.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/15221918770.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3551ea1afd---70249879691.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/fawozogiz.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b7db55f30---wevalokap.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/13127357276.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e3fd7c0c0---dunosefamonafomubed.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c431e74fdba---36605960216.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/xidokurasixif.pdfIn PDF document text
    • https://parc-hotel.info/file/9178375649.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/nomotabotuxudulipikex.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/f212ca83b8ed1b7e2a59a3b4fd974fe8/78927802282.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210902105013.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/lezinujexaxeravenemeg.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608729ec04cca---gelosaj.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/f1829a3744f3bad68b754ba71e17a5dd/wisusubofupufizuvageg.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134164c445cc---90071063739.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_off0000e40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC25 10656 bytes
SHA-256: c76f5564aea921df6a6a067806d0cd5ee71d28a244b856b207fda709db9eb8df
font_02_sfnt_off00011442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11442 20448 bytes
SHA-256: 34f8e01b2ca80e444072f4bbcc7d47519b8fe049a09d846e8df269d41b5694e1

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