Malicious PDF — malware analysis report

Static analysis result for SHA-256 60cc413712ab7d20…

MALICIOUS

PDF

85.6 KB Created: 2021-09-02 13:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0f8cd07bc1a7c0469da95772d37b9d45 SHA-1: 16c9fb3440cc48589f7f3ff06b8deee2104c1cc8 SHA-256: 60cc413712ab7d20886c8ad6904ab4ef4759c2bcd5513a308c173e72ed1ebfac
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites utilizing the 'super-forms' plugin. This heuristic indicates a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://aldea.work/wp-content/plugins/super-forms/uploads/php/files/4e0ff51b63053c5a07ed88b752cdfd22/29331074208.pdf In PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/xenajakijijuw.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/473504a577ac085e4c8293e90c42f249/fimigu.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/tupefexarawi.pdfIn PDF document text
    • https://avela.md/userfiles/file/mosepatunelalevobuso.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/6da58e264b715c9490668fe0dffe4274/xokavinatuzajiboxuseba.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ksddit8tk9g42urrs2joc7n2u2/sobibenori.pdfIn PDF document text
    • http://tangiahoang.vn/Images_upload/files/21807978728.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name//files/wozifusoxeputugojiradexi.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160acc08d493dd---ruvizevupimavamitivosa.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/71902931492.pdfIn PDF document text
    • http://fine-trading-knotwork.de/uploads/media/36753156921.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/gofakuxavutonog.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/wawilajumaz.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/a22f47fa92be487af1f211568a66d82c/46523352293.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/vqgbsb9lgd30u999dtsqqarit9/725381568.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6af24ccb6c---xafadabopudiwamu.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/16274296153.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a9dd15da9---bodirolabimuvizop.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f47e59d879b---37808020339.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=nothing+is+impossible+chords+key+of+c+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD062 11228 bytes
SHA-256: b6a49d7c8d8a2d7322b03214e4ba9c69e8ad1e5c0f6e4b65a292b2729686fcaf
font_01_sfnt_off0000ea14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10225 16448 bytes
SHA-256: 0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878
font_03_sfnt_off000118fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FA 18124 bytes
SHA-256: bd12066b189eabd8e4d56c797096dbdb82bf892b459dcae6a8daa5d6ac3fdc3b

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