Malicious PDF — malware analysis report

Static analysis result for SHA-256 127e2c3811ffec2a…

MALICIOUS

PDF

81.0 KB Created: 2021-07-05 00:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 52a0ce3098c5b33941277c5a36a6c8cc SHA-1: cac474015d41431cc269519b26dbd8f815b66178 SHA-256: 127e2c3811ffec2af6ebe4051d2446581a479ef624fea6f4899daa74886c49c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to potentially compromised domains or disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://d4storonto.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/terateraxixodunudoso.pdf In PDF document text
    • http://yilip.net/userData/board/file/82370223609.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/elbdmc6iv954jefg5895e8gbjf/48325053707.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/luxomenanuvuvupagomesako.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e2220049de3---newizazejox.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/99373661222.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/34814885361.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc18e7659e---godolevonozalabukorozajob.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/220a59aafd73bcd37ee5444474fac3e9/74823936874.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/mopexumifakubafa.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/78158157338.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/i9m88s84agjoa5nap1ts1bb92o/51330239162.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c486790908b---92735176007.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a149beee293---24680294819.pdfIn PDF document text
    • http://bhs1966maui.com/clients/64750/File/zekimeture.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/14816048046.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2851358d6---67844930816.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/59981574821.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/4d278294a64c99facd82db8323b55f0d/91325585335.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a42ae167f7e---16091734552.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/950739d824e863783e1f99d9c2061436/wopedazugubevobar.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/f9ca2a0c9f26b62ea8e95a47b82e34cc/95176384222.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/0563kqf5ai62lg5el2s7jeuq04/59819463984.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7362feaf4a---85118888350.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/53168154194.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=coffee+cup+manualPDF 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_off0000d8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FF 17468 bytes
SHA-256: 4bb5d3cb8587fcfe6dcea8b7ca282fd1b85dcdf2cc64f19c1f4cd0bb0930fed5
font_01_sfnt_off0001060a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060A 10312 bytes
SHA-256: fdf6964c0130e52ce526e076ff6655804c72a49b5275b949f210bbdaa5d6ec4f
font_02_sfnt_off00011d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1