Malicious PDF — malware analysis report

Static analysis result for SHA-256 d409f6f9f072c77e…

MALICIOUS

PDF

89.3 KB Created: 2021-07-31 05:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c14ea28fa506e502c59fd1e1876c5618 SHA-1: 43aadc8a88c3f5a948ce676ff516121624c4d3ea SHA-256: d409f6f9f072c77e48f9d6a445eee74b596b07b4c941f814191c37628f0f9698
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs and link farms pointing to compromised WordPress sites, suggesting a phishing or malicious content distribution scheme. The document's structure and content indicate it's designed to redirect users to potentially harmful external websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://smidgel.ru/uplcv?utm_term=how+to+get+aimbot+on+iphone+fortnite+ps4+free PDF link annotation
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/09971b05cc067a232e177cdda2fcf2c0/51211316016.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160942b8badcec---25899349188.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/xalifaroramefegoso.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/835c34cb5343799387e9bc120812c8ea/jijitibakiwisozivotida.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16076906f448d4---baguronetapijamugepa.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/36975342100.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/96138728138.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160967f9b34613---devasozifedat.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/rerus.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/33264419932.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1274ec7dd---87380967435.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/6c652fcb22ed5f2ebd911bf297c231a1/7668486523.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd0dd89a1e---41325717553.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/34689251787.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/78226266955.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/0eaec9bb132076680cb57fc67908d9a4/migofuwom.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/3efbd06122e5fa2265c34abc3a58d0a3/pelitubugopix.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/319503a639b004bae79a59454afba319/widuketigimilariwo.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/n5lccvie0o87st8d0gn2emhfu3/xalaben.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/72043740728.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/44e0760bb64747edff8b92ab327a626e/wajowaximival.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080213096115---wijurope.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/uj03t0ut7ahd7d8vs60kma4q6t/mogezegefojififikimek.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_off0000f903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF903 11052 bytes
SHA-256: e6735df259957e6f0390b5ab35ba4f99feaf48b8caab300de42b358a8a0cd7e2
font_01_sfnt_off00011263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11263 16924 bytes
SHA-256: cf4b31e58f430844b68bb6fe8d587852a68ca1b67baabbac7f64db61b8804d20
font_02_sfnt_off00013e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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