Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d722378785462f…

MALICIOUS

PDF

79.7 KB Created: 2021-09-18 20:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7971bb6b2214a1e52c9bc678a46723d2 SHA-1: 1dd4b2490875be571d6f00f4ee60755f298dae97 SHA-256: e6d722378785462fc5fb28e484cf6db4c43dd249bc73ffd741652706ca41aad6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of numerous unknown URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://pieseclimaauto.com/files/file/69474694760.pdf In PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/73338692124.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hccv0jn1c7gl5sj95fuoigsu34/94410782636.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/21448300508.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/42287042209.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/kopoxavarukarijegirixu.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b537283fa---96341267005.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///lalofexirezozoti.pdfIn PDF document text
    • https://gallerylingard.com/uploads/file/29157352856.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/4bvu513gbljscsbs910s6v504a/9741187201.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/94355167760.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/gizulajemoluduni.pdfIn PDF document text
    • http://www.agot.pl/upload/file/fijis.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/26461996619.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/zakipujebokivelopewipewi.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/9412409544.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/go14scjo5h93v676e2dv37stg6/75106113200.pdfIn PDF document text
    • http://silver1979.com/upload/file/90524023573.pdfIn PDF document text
    • http://coomargroup.com/ckfinder/userfiles/files/23224878377.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/57208499141.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/pufowixazub.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fekeparuki.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/nupowebipisojedewedus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=galaxy+s21+vs+iphone+12+miniPDF 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_off0000d24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24C 10812 bytes
SHA-256: 2a8015a2948fbc99e9b237fb0a51774b7b3dfe518e8461811999779d1405a168
font_01_sfnt_off0000eb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2B 17688 bytes
SHA-256: b56bab204a14b716547e544acc565c4ef0f6f97ede112d22fcdca1ab2d53dd9d
font_02_sfnt_off00011926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11926 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1