Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6a0f62799e0be4…

MALICIOUS

PDF

82.0 KB Created: 2021-08-15 19:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: a029879d901e46e9c9d41e200fa000c0 SHA-1: 75b2c60d5e3bd570dd86ec268156290b2d88f668 SHA-256: ed6a0f62799e0be45e91eef841b5e498936a83c343930b9ae5b0fa9c1bdf53b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8196

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://cmuniontravel.com/userfiles/files/somajixoximep.pdf In PDF document text
    • http://lex.tj/img/file/30037978129.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c142b30de10---53210076714.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/mjl34rle2fdkmch66hs8o3cq5p/gefixaxaxitokabujejufopew.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/n8l4ddlcljujknr8sfefgo6ddj/dokozefu.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/bagomipa.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/60627896989.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/gufipame.pdfIn PDF document text
    • http://mrsgladysosei.com/clients/f/fd/fd76c46f75d01f7adbe86f52c2a5b8c1/File/jorasitalakakofekus.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/62791041875.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160934f15537f4---vananikomebexorutirolovok.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/pikovixuwavesokeviv.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/24aa5edc447cf8894eee8d3e3d563412/71000395674.pdfIn PDF document text
    • http://www.vnos.vn/app/webroot/uploads/files/48258816248.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa86f181a4e---tetapa.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/fb6f447fdf349e67bc90297738ced97e/82313027531.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/fumovu.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/39193953354.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fc47b3e9a---zomovev.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/74ba0adf89e1f796f1132c15486ded08/kubodupimezavasediwoba.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/ep44dednhlqe4ve5gh9g4932cm/67606335943.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/dfea0b154cc36c547db364ca33237fd0/59182951037.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/f8cc9403c475e5dc6180a7d9924097f4/pobetazonusi.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/dc0dc4f413f06720ab2da1b422d3e1ea/84349234711.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=what+can+you+mix+crown+royal+salted+caramel+withPDF link annotation
    • 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_off0000e45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45F 17432 bytes
SHA-256: 3043bab0702dba4cd7c4239dc029693cb3a0421bbfe7ec8e3b5e7d71cf785893
font_01_sfnt_off00011215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11215 11032 bytes
SHA-256: 0290cde72e0ff71851a7d0682a4453cf050dab43b8e8b9ddb500cb55433202e6
font_02_sfnt_off00012ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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