Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c2397a7c0b5d0e…

MALICIOUS

PDF

80.2 KB Created: 2021-08-08 20:38:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9da3a18e31da4fe38749dd33944d7b10 SHA-1: 2561df45b8cc5fb68e36bbbb4a1e50ef9fafee3d SHA-256: e9c2397a7c0b5d0e7f9d854e73b8738e5144add631329bc4124779019e4d355c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm pointing to various disposable hosting sites, with one heuristic specifically identifying a link farm on disposable hosting disguised as a film download. While no scripts were extracted, the presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggest the document's primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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://tw-sincere.com/upfiles/editor/files/41415251990.pdf In PDF document text
    • http://spamsmsgiare.com/media/ftp/file/93223256253.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/f6c35476ae0c747cb52c31edfbde850d/10890504739.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/bamex.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a911cc78898---rutisu.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/vipokaxitazadadafajajigo.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086966d1df30---45954114763.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/g11r0ijhgt1qp7gjdpm3qb1gof/12437488290.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/141845023032.pdfIn PDF document text
    • http://schokobrunnen.com/idata/52984910850.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609264c11e7b0---88787772601.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/co7tpb1bagnslr7rrb776ium0c/vosuzigobe.pdfIn PDF document text
    • http://www.neocota.com/fckimages/file/sepobanipobuduza.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/5sqmr4bnqt78i4vo14kto9ecl0/zakifeboguxomapapujabadi.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/zezorofikomaridu.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c73b58284f---65055037229.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/a12a68d8bc3948d5bdbe7e61a258e63b/13708091788.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2cf9d2c29---67220992473.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/64720668044.pdfIn PDF document text
    • http://reflita.lt/uploads/files/41857629120.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/30301394836.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210731_E7713EF9684B7CA1.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/pudowinadorutapo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=download+film+ada+apa+dengan+cinta+2+ganoolPDF 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_off0000d5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A3 16996 bytes
SHA-256: 996fbd83676683ef0532233b15227be26ead733e8f365ca127941d48c3f64fe7
font_01_sfnt_off00010243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10243 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5A 10904 bytes
SHA-256: 84e219331d6a6f531c15804e3b3acfbf41ff97afd22c1a0a01610b79e40e1e4e

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