Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c4d9e619f3f1a7…

MALICIOUS

PDF

89.8 KB Created: 2021-09-05 17:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 606b069807cfa09f0c05d5e389b89286 SHA-1: 710afe31dfe05ac2d71196509aaec8b03b516e72 SHA-256: 75c4d9e619f3f1a74da547dfa72cb91ecf55c3d7165d5c3b26d2f2ef0ba781bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious content or phishing pages. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081cd276a18a---jetawawi.pdf In PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e8812711f---lavawukifikupijubuwase.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7120b8949---vonivek.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/muwisuvojizusiligogufigik.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/ganasiz.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/bukalux.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160845c1319158---54466533491.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/084e5d830ff97d9efe7f63299e18fe8c/misuwibene.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/sqaaq03a70hrslor8h1ftsblp9/55388265450.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abaaa3969f8---lavejuke.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/7ab3iogmr3vkjok6s7l5u16g8m/84791154983.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/9vj601f1u310tbnac7155cmmu3/95663133243.pdfIn PDF document text
    • http://vecsecity.info/editor_up/mazadibojowezi.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/88212936565.pdfIn PDF document text
    • http://wamer.org/userfiles/file/vepimageku.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/81321869447.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/7f6865299c27a069656e5020d084352e/gapawapemanadimimiru.pdfIn PDF document text
    • https://ccskin.com/geektic/files/zidego.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607818ca4655b---91629324275.pdfIn PDF document text
    • http://transportdiverse.com/uploads/files/9932954145.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d3355240d36---60423787483.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/3980760877.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/vojod.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/malirubakuvanifo.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/tewalurumebadafeluved.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=wemo+switch+smart+plug+manualPDF 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_off0000f7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF0 18632 bytes
SHA-256: 4dff802202156ff98f549c53f469abc22fc1ccd5b537a17cbc1e364ba5f41cb2
font_02_sfnt_off0001407a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1407A 11000 bytes
SHA-256: 5f8b3924219c68b66fe35b5587db4743fea830c9dbb277542de83cd79016ff44

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