Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e58daca9ed44f40…

MALICIOUS

PDF

86.5 KB Created: 2021-06-29 11:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7aae534fd135dbb5397fea29393ae10f SHA-1: 5dc59acef68f3353279c9f2466b1162058a6b52b SHA-256: 6e58daca9ed44f400c97d4cea7013dc303fb18fc4ff47b9626805ec7c685fb96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://oniceh.ru/uplcv?utm_term=how+to+find+the+perimeter+of+an+irregular+pentagon PDF link annotation
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc2b4b06aa---gixikitarir.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/67739496269.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/9b9iv264sudokfenkjvng7c3v6/19315887274.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/66535358925.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/boduvenosesomidopapu.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa41a0718d---80624274370.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/9a058f3426ffa1cbc4e2024d41e46d8d/rizapuvimelozaki.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee8710f7f9---lafodikodeteguzol.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/0e2082abc51ee6fa4b1fd6f10b5df511/zagiselubupabufenopezudax.pdfIn PDF document text
    • http://berbun.com/user_img/file/16306275262.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/a702328bb7196e5eb3bffe473be712be/46447076953.pdfIn PDF document text
    • http://jngf.cn/files/file/62357073884.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9fe2522da---zesidulesenal.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/7034858334.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210506231227.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/cc00c8abc94d81f41d26b0cb6358ebaa/32563024262.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ba68b30fa58---96642227879.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/dadimuman.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089253cbc710---14160947092.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/91545552281.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/ijmfbt7rkeqfb19kul6ncfh177/watuxugajuxomik.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/7432eadde6f996d04da58dce1a769bdc/pimomiv.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/rd7ie3cdlu65mk2q38c8bab94o/rasiji.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e517524b09---wonekikelixubix.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/rifusurixolidovesaraboj.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_off0000e7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C7 10952 bytes
SHA-256: 35e96054137fb6266e27df32d131c64df6c3a4b645b20838da4e746aed9ecabf
font_01_sfnt_off000100ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AD 19124 bytes
SHA-256: 1725516b3eeba40bef9717f2f03cc709b3ed67ab13dd2bb828ce5831bacad96d
font_02_sfnt_off00013422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13422 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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