Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2a30ce6ae34952…

MALICIOUS

PDF

74.6 KB Created: 2021-08-07 09:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b6dd1fe7e05a722cd3e7551e4441f878 SHA-1: a0b565152a85271757fb3e54ab27c4ba22ff1279 SHA-256: 9a2a30ce6ae34952b97e245927fe1619d05e32bf22b8bf85d97e009a9f6d2121
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to domains identified as disposable or potentially compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be acting as a link farm to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://magogaralbamoble.com/galeria/files/tigopilawadadaka.pdf In PDF document text
    • http://ibb-online.ru/f/file/49911149606.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/fb6d9eeaeeb1018ccce6a2dc819d22af/3275444264.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/mls02h1tku654n40qc048f8lj7/gufaz.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/zovomizekorero.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/vadimoripedipiwepumazuj.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/90022629996.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/97249515189.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/vujerariximune.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/74063216375.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/19713427078.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094073376660---safamuvikanofag.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f31b891dead---fobevu.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/7jh2d3mfmfpfpcn0ela888hlt5/zojaxemimakowokikinur.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/64711529818.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef35661208---pitumojebotimo.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/45502875869.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e478537cd---25121030561.pdfIn PDF document text
    • http://autavrabek.cz/obrazky/file/ludinonofetukiwajetu.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16086dd3e69bcc---64403684634.pdfIn PDF document text
    • http://cuatudongnhatrang.com/uploads/files/46666220521.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caa67611ec1---72091748751.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ca10c7d4b---fesanopebiwodakafadifid.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100b4b36bebe---diwilezizigisefumiladu.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/demuxasezebapavu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=kana+boon+silhouette+instrumental+mp3PDF 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_off0000c265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC265 15952 bytes
SHA-256: 0cb21c603595d39a001741e3da3d9962b16a33bfb344252d5cdd50b50879920d
font_01_sfnt_off0000ebb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB5 10920 bytes
SHA-256: d9d14378c23729124da64012b5a26ceef67ae749380346fc0394c680fbdd212e
font_02_sfnt_off000104a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1