Malicious PDF — malware analysis report

Static analysis result for SHA-256 9706e91bbf92ab26…

MALICIOUS

PDF

83.2 KB Created: 2021-09-03 20:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f3b02bc0008afce8e2bb4c0aa2605e10 SHA-1: 51bf70d0c870957cdd2e651f193e74a02a6899dd SHA-256: 9706e91bbf92ab26fcc470d57938e738290853959b6e127520c41c73637c6be1
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. The document body is unreadable, but the presence of many external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://vodnik48.ru/content/file/tesewag.pdf In PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a74122fb5---85513476930.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/bts7vo6ftqjn0mob4oemed7pke/duwusijiduxirig.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/sofimafinokifonulonar.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/5eanrb55l1e8hpi0amqi8m3rh5/zukemodepapok.pdfIn PDF document text
    • https://invest.pl/userfiles/file/wusewewirevamizena.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/zewinagilipepenogo.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/85901001777.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/raduzozo.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24c47c7851---94495254913.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/73272812452.pdfIn PDF document text
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/mejiduw.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/bafafelalatetozamufed.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16075ccc160e9a---tutenobivadora.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/69c16b4d1de9859e64df3397e310740d/bafuxazinuzemigez.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210803065633.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/e5a4c175dc9a533e6742cd7235c0833c/jaraf.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/ab7efe964a99f0fec887c5d138c79e0d/12260528134.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/497ea2f39e7403b32a8b179a6efe487d/pevapabaponemiwu.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/161044aaf1947d---zazadowopezog.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8755d90e4---sizobupeje.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/77451393252.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=compartimiento+anterior+del+muslo+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 20440 bytes
SHA-256: fbf52da8adc42892c2afd774d663999cba819f4272c60f174ecdedd6b3cecdc1
font_02_sfnt_off00012480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12480 10788 bytes
SHA-256: b616bbde9974a4c7841b5cfef45c7bd9fed24e93fff7c8cf54b093d1f8dc0032

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