Malicious PDF — malware analysis report

Static analysis result for SHA-256 962e928830333b8a…

MALICIOUS

PDF

82.2 KB Created: 2021-09-01 20:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eb2ecabcf23e644f88e40ce89dc35c94 SHA-1: 414031d6a1e0dc6aeeb3ce7ec86fba361d104d35 SHA-256: 962e928830333b8a58e33ae6de3114db84ccf796cd6eb6943a173b3568329499
156 Risk Score

Malware Insights

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

The PDF contains numerous links to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://superplasticizer.cn/d/files/bapinepugapobesukowodi.pdf In PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/6bb1889adad19de8bf489db6d164f56f/68320608765.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16084e0606982e---1573839822.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/damij.pdfIn PDF document text
    • http://www.gc-antey.ru/ckfinder/userfiles/files/tajavulojetisem.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6932ab3798---vidosanixofumiwelote.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9bc67a2bc---foweluwe.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/32868630949.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/52298864169.pdfIn PDF document text
    • https://tavio.ru/files/file/41584411358.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/5322218778.pdfIn PDF document text
    • https://viettrungson.com/media//Files/11924290967.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/53f0ca8cbed9c286ef117db1633cc46e/60077440347.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/fodasozisin.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/27981722536.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/ed9baf45400176073162b7ac7ce3b233/33321440214.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/n9r0nfl06kasknj4qpj3p2b221/27167165282.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/linexujabe.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/74910984045.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ab1d1dbb7---dafunorivelurajeze.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078fad67ef21---lipiwamero.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/69080324174.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/zafijesejegesavugokawew.pdfIn PDF document text
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/44802864811.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a4afcb10b1448937a39bb994dd6efcee/47137648291.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/72400045679.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/27840896446.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=mind+mapping+template+powerpointPDF 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_off0000dc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9D 10648 bytes
SHA-256: 78f40b9eaab20f75f965a446c0b8d760b586d212be2d6ef96fc132d636cb0fca
font_01_sfnt_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 18480 bytes
SHA-256: c0b9eea33628a948fb936f66c805742fdcba32d5a4289a4611e2aa453cc58736
font_02_sfnt_off000122fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1