Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eee3d20bed9ce20…

MALICIOUS

PDF

97.0 KB Created: 2021-07-03 13:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7e3ab771e0f0d9641698b79d8cf6b7d3 SHA-1: 084c67f8ce6769063ee476484f53858882c24b72 SHA-256: 5eee3d20bed9ce20cf0c5aa1c6fab6a78aaad95716946ebdf2f01828ee4dde77
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as a link farm, directing users to numerous distinct hosts, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV also strongly indicated maliciousness, with ClamAV specifically identifying it as a phishing trojan. The embedded URLs are the primary indicators of compromise, likely leading to phishing pages or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3b335f047---tudowuniwezivubibidaz.pdf In PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160dee6a6b33a0---24803694340.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/p9bvnbslv9hn86onhrhqh2q3m0/12179233007.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/82460447882.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/15928916721.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/60288822428.pdfIn PDF document text
    • http://hnatiukreunion.com/clients/b/b5/b5561851e3069b632e798ef7a1275556/File/44364378640.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/125d61bc12839bc7e95255fc70ca5248/9725503509.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/7f93f92ade55732d79fd567c55d4bbf4/wuvegipuledixuj.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/84850257350.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/b67e7a0106cdfb079f91c7e08bcc407e/buguwarowepulisedubiduk.pdfIn PDF document text
    • http://griby.biz/ckfinder/userfiles/files/95629667679.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160886d5a2a976---87743892928.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/f8f0bb89f01b5e90a89c5fe61f202848/segodala.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a385dd78a---69834606092.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/31g229m13cj0dtjd3fua7m8pdo/defawuwutuvotex.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/08935c92d269b52ec963365ffb3b54ea/40886186351.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098308b5ca35---masis.pdfIn PDF document text
    • http://weddingdiy.cc/uploadfiles/files/20210605_010503_7104.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/lugunapesigorefujib.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df0f80d5266---43166124446.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/4314686272.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbf64046f3---sadaga.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/vazekimagosevoja.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/91060952390.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=galanthus+philippe+andre+meyerPDF 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_off00011719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11719 10788 bytes
SHA-256: d7923473e7955bb530d5b411402a7a7c0aaff2d9d85b2f0862da0b3a0f5a1df5
font_01_sfnt_off00012fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC3 17804 bytes
SHA-256: 2008f67e50a185d808920f1031c989f02114738334fa0e3bd34f9ed36d69178b
font_02_sfnt_off00015ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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