Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d9ace3f3f69e0f…

MALICIOUS

PDF

96.1 KB Created: 2021-07-26 13:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 70b13793c2c9cab18e24f9e1b4387a05 SHA-1: 8adcdcd54271e5074dfa7a427e880a07a437a6f7 SHA-256: e9d9ace3f3f69e0fd07fd136ba3102cbcd3b2c36f3cfeaf743a591c1b2a8e71a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://z-i-f.ru/userfiles/file/wolivomeninodejixelibuju.pdf In PDF document text
    • http://kzlo.pl/fotki/fotki/file/52077572230.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/43505506502.pdfIn PDF document text
    • http://judyzscotties.com/clients/1/1f/1f1ef5c9f72ce0e5bea5babf356718c6/File/ketad.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b30a3a966df---dagojinonukuma.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/15435838086.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/k0fqcmvqi2rpevren2ou46n0fr/72361272483.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdd79324d2---libajitakezidef.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/6585973963.pdfIn PDF document text
    • http://fittbike.hu/files/file/86878330732.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/bemuradirinokigurux.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/6778b1be48046f31ff97f1a5c6012954/giraj.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/watizajanaxezolavop.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/kedoleve.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/ab192a4d1d9c239c7750c001c36d02a1/baxunososapabewegodefaje.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/mesomasituwoz.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/83678884685.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2020.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/41448054058.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/443eff0a309d74b46838e4ba0deed383/47785226729.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/nutuperaretix.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/xeraxevevimepiwemiw.pdfIn PDF document text
    • https://toocapen.com/files/70704021762.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb3e65c420---foxowatedaziku.pdfIn PDF document text
    • http://allasclub.com/campannas/file/56079033379.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=all+ap+lit+question+3+promptsPDF 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_off0001138a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138A 10812 bytes
SHA-256: 2ae8cec5ed1d305087bbe5b622dbd8a4646b999d7de02e8c8950fdc61ff21dbf
font_01_sfnt_off00012c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C83 17324 bytes
SHA-256: 0b0bbb447f20633713abdceef3244e3d1708e2fbe7f612069300008cf1a5cd38
font_02_sfnt_off000159e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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