Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d935ab6cbcb0d4…

MALICIOUS

PDF

116.6 KB Created: 2021-07-19 17:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1247a0800fade0457c6b5157f55dccbb SHA-1: c6d06ca06daa93c7718923696989073bebd5bc38 SHA-256: 07d935ab6cbcb0d400d784e8b7a9215f294fd7c901614cbb1023caff6bb08419
196 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, identified by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the intent is to trick users into changing payment details. ClamAV also detected this file as a phishing trojan. No scripts were extracted, but the link farm and lure indicate a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/97708ec1e0cd244cc17f12412246173c/36764942167.pdf In PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/m5akttt136fp30d941c6k7qqoj/38276928612.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/zubivotufejebinafev.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e7f3c6f25---26130108423.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/jibojifivomiwimusixavudu.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/4df4bbd990f558af9d0a3d25dac7f34b/jinamugolowafak.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/9raod1a4tr6l0pld3t8vqii144/47246142903.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aba6d13e28e---39503862999.pdfIn PDF document text
    • http://koala-al.com/d/files/22303415166.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b04b745788a---lijigodagebuzakomekixu.pdfIn PDF document text
    • http://phs60sand70sdecadesreunion.com/clients/880504/File/58009234110.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/53680780977.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/2bhdnoiua24ai1hil3istmst8t/78316689738.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cee96fab075---benire.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ddec09aaf5e---dosaz.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/7pm04srbsb5me4qiuiqmcttf2k/nopejotuxasigemaxuza.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/zovunotatufewoxoxelabu.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607266a30d3f5---7555947376.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/7irabusl6dl0qjjatsr4s7uf3b/penipa.pdfIn PDF document text
    • https://chp-travel.ir/data/file/tawisaxoregujunuzume.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/26202041913.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/31489052275.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87c835e784---33653720538.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=link+state+advertisement+types+in+ospfPDF 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_off00016346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16346 17668 bytes
SHA-256: e5df2af287ee54d0ab84e08c989ddd5cbb2234dd38f6435e7280622236504870
font_01_sfnt_off000191d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9E8 10844 bytes
SHA-256: 0b74c8e4b3c3cda1a3e26575e3518969f30971ab36425bd343b39a3d9ea70f84

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