Malicious PDF — malware analysis report

Static analysis result for SHA-256 732babd4fd2408ab…

MALICIOUS

PDF

80.4 KB Created: 2021-08-15 23:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: a40ab00fdf7a10b97a95216ef6e378ca SHA-1: b233b58c69e4b194ab3532e03603ab765a531736 SHA-256: 732babd4fd2408abb1ed915d9307a9c7bf96a7b7e3ee4d691bd3d7f51327cce9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. While no scripts were explicitly extracted, the nature of the link farm and the PDF's structure are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/dp9ogp8g33l3cof9cmisoa2du9/xejabofovalezamome.pdf In PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097aa0bccda3---fevegokesavinivamuwerise.pdfIn PDF document text
    • http://m2m2design.com/userfiles/terozituralegixowixozaje.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83c561dff4---80929962405.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/4914868818.pdfIn PDF document text
    • http://qdjshg.com/files/file/fegufuxob.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/205466d660d1906707c88ded966155eb/6175530334.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/xalejofavegagula.pdfIn PDF document text
    • http://kasargod.net/uploads/file/55978165579.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/b39cff76d7e59d5275112eb9a67e9afe/mifusorurobok.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/xuzulofasozizo.pdfIn PDF document text
    • https://jss-moms.si/upload/File/sejeropapobefi.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/wodage.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3f399419f---20522676931.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/e0f770c182928ef06ceb74ea301445d1/67339713397.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/xebudugikapejeke.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/34557158620.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/80120202665.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/10637624346.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tn00k5pt9bj9a1e0miq7lh5kc4/37966132718.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/43604740307.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/96490294833.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/tonudebomedupoxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=formulaire+procuration+compte+banque+postale+pdfPDF 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_off0000d302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD302 18212 bytes
SHA-256: a4fde726b0cf7b31b8dc3af1c6eac72781454c6f199e7467e61c8b86ce09c187
font_01_sfnt_off000100cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E4 11144 bytes
SHA-256: 52b7f4779e4a89fa0344e3e430ab17b4c90488ef98923725410f2eb42024244a

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