Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6df12608c932f30…

MALICIOUS

PDF

96.6 KB Created: 2021-07-23 19:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2ba0eef913ff62cbcc9ded8cae3c1695 SHA-1: 17c4abe1ac8575f241ef57e41522ec76cbbfba82 SHA-256: e6df12608c932f30085318f69e6cec11cde418ed3732b75816833e7ce9a862ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malicious content distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely intended to redirect users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/f280a5ef5e6e9d69b8305e810e8163e0/9646367289.pdf In PDF document text
    • http://ailizia.com/userfiles/68679245282.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/39144846925.pdfIn PDF document text
    • http://dlikefulproductions.com/clients/875850/File/52033171405.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ace47f6b158---dumadokurusosijilazuf.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720178d19d0---86428796149.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/4529e94b489350b70b663bdcd266d211/20628831569.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/fezalaguruketo.pdfIn PDF document text
    • http://www.chubsorn.com/file/files/luxenatuzirapove.pdfIn PDF document text
    • http://surtek.biz/image/files/20150123_072107.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/29995304686.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/e570ec62ee342a97579cc8811cd46978/84446995600.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c87908170f---gavedoman.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/pupefusakavodiw.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7a429b6f7---33823508734.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/povuzuxakunuf.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b8885c59bc0---52504286457.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a58995e49ad---gajebikaneti.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/1423424139.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/kofodegobux.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/58mush49gee6l0nfml8i8nfped/76895122339.pdfIn PDF document text
    • http://arslanemlak.com/E/file/50031035070.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/a7d501c2a78dccfaf183e9b174fc633e/99505301160.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=list+of+marvel+movies+to+watch+before+endgamePDF link annotation
    • http://irodori.kir.jp/files/file/totigojigel.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_off000113f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F8 17556 bytes
SHA-256: 1810fa06e81b5a5282f7641ae5a57cb1e2659a3bfe386122a2a87a6293112e3b
font_01_sfnt_off0001412d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1412D 11172 bytes
SHA-256: a5972102d3bbd9d6587d3c6512bdbe3e3d0e57940df474591c16934cdc8eae81
font_02_sfnt_off00015afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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