Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69288cb24c4e229…

MALICIOUS

PDF

84.1 KB Created: 2021-07-25 21:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a2d283ceb2fb5f0a12cbbeb0847692f0 SHA-1: 1ddb6ecd6dcff5af0dc0ee6c8213f8c6deeb6a49 SHA-256: a69288cb24c4e22975134769b73e8b2dceec4de9227acd8d750c2430102e7fde
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be compromised or used for hosting malicious content. Heuristics indicate a link farm strategy, with multiple URLs leading to PDF files hosted on potentially untrusted or compromised CMS uploads. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://daaeportrett.no/upload/file/wodage.pdf In PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/fanoferumux.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3eb3f3313---45119506445.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ce924138a---89332673408.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/79932082443.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751ca9dfabf---welafipumeza.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/lobip.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871bcf4ad37---74088912338.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606da147a78b4---nulimekosajoba.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/46181561374.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202168024165157.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/86824001671.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/duzadadoz.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/57265166186.pdfIn PDF document text
    • https://seerupit.dk/assens/file/xapiwebuk.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/fbae51cb99d9e250ba52ec86d35710a3/2276488244.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/tikigixexatopudagomalake.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/54581625627.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/68845979949.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bs6r5d9on91s5j3b55mjliv7u6/ruxeke.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a038ce00238---tomatupifikumoru.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/um45f4pvd5unv0pplc22qvp1rj/zajijedajopejamixisa.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/18059891022.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+cheat+on+rolly+vortexPDF 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_off0000e6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F2 10428 bytes
SHA-256: 0f6c15b27bef039c01b3932a54220a5dbe2097f40d83bb299b6ec1ffb00a328b
font_01_sfnt_off0000fe89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE89 16972 bytes
SHA-256: 8febe7e2ce9967901f905194e127cc043df50201365383da7c034384ffa55d9c
font_02_sfnt_off00012a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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