Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8ad54bd3866372…

MALICIOUS

PDF

80.0 KB Created: 2021-07-02 21:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 0241662beaca06e78b0e62cbeec158bc SHA-1: b383632468abd1a6626a59997a13fe170566d3f5 SHA-256: 2f8ad54bd3866372e5722d0b5ed7c5dca9c08fc4dc9875d4943995b848d1b111
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.4801

Heuristics 5

  • 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
  • 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://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/b539755f9cb998b67fdaf5803d748aad/vixodopovugebafum.pdf In PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/u6mj1162v8g5tfhtdari7j8jcr/jiwasidotinibiforowirebe.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/43418910289.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0ab68e734---jupazonasavex.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/xavem.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d29479c4c---77887283656.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/bajuvafitedat.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/cf70a7cbaaf8221acedc9ec9a0aa7409/xapawokasedamav.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/60cb76f408247d2c621ed899f0b4365e/lidixemarenilepebin.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/97491d543480c600174775f5027d0a7d/76363078757.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160950e4311ed2---zizazetenamafajik.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fb39b4e6c---rosuvitaxab.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/zadegotozipukimiwaw.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b0801b1fbc5---86197461297.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/bonolot.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160aa12321eab3---85724802655.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/24244505512.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/99cd50561729577a060ff7c6659dc03e/wuwabozisebomo.pdfIn PDF document text
    • https://longhoang.vn/upload/files/bugikigovojamibiwis.pdfIn PDF document text
    • https://luminex.pl/upload/file/tuzojewevukejekifibitowu.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/c555e75cc242d50a97c9a15bfba69b63/kavepulisex.pdfIn PDF document text
    • http://keramann.ru/uploads/files/jakenewebajafuvanatizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=acer+iconia+tab+a200+manualPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 10684 bytes
SHA-256: 953f325c8b54684b3f53de7f3c0c2b4a377f2f79b5e13de1d0ecbcd81572b60a
font_01_sfnt_off0001065b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 17740 bytes
SHA-256: bffa201ed77d829b64f8c5c1c29bb26332a9f950eb535e8cfb3dffa342cabe9c

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