Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c3791514627b66…

MALICIOUS

PDF

80.0 KB Created: 2021-07-17 09:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0f25d0f5e33655793b2b4c5c6f9821c9 SHA-1: b42b0f2826b8843d434ed273002cfe2db3ca8bbb SHA-256: 17c3791514627b66960fede7a3bee1793066315592057e8f9ad7112486483201
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, specifically within form upload directories. These links likely serve as a link farm to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc251a69c3---58893324566.pdf In PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/fd9a494968cfc46a5d5ded76ed01bed8/levafegemifonunafot.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff181e4bd5---3455290696.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/webok.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/7d02c4d8a17617719e4da6218567cc21/38549222243.pdfIn PDF document text
    • http://standdominica.org/files/files/39407162886.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/42272c4db0f2ce24eb35a88ff59c2521/92897337252.pdfIn PDF document text
    • https://reniuved.it/file/16462789813.pdfIn PDF document text
    • http://southport1969.com/clients/861680/File/65010951523.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/l2e7e2vf7i3a66c4psbq0e74bf/67283816896.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/ba6ed733e4452f50696472d2f2acf9ff/febunopobu.pdfIn PDF document text
    • https://areicon.com/images/file/paxiwisifu.pdfIn PDF document text
    • https://petala.gr/userfiles/file/19734029029.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9f54bbd2c---65675917203.pdfIn PDF document text
    • http://jucal.es/images/file/pefakuvexelovige.pdfIn PDF document text
    • http://sherylrobphotos.com/clients/56056/File/99823127743.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/kupepizovakotesuwamufesat.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/74236585783.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/gn0jeg7uk3tieik084kjj72n9l/siduxabaniwirugopuzudefag.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/rv3lv32b0bghnhl9sk2bp785u3/58266446881.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/25dbecbe3e05cdc58514ab19cb7d82e6/70543530547.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c73b9f66f3b---60268330458.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/7ej18v1ba9umhh06dmnp4qqlou/polejexezolemedelavenip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+much+letters+are+in+the+alphabetPDF 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_off0000d69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB4 10956 bytes
SHA-256: 27010c1462ea3e695e8693cf5ce4644945c40b3ee4fa1fbc4c41678d952021e0
font_02_sfnt_off000107b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B1 16532 bytes
SHA-256: 1d22e17342e7fdee9a3bb3ad13bd9ae9c50e7c5b23fa0a563ff846acad168d47

Open this report in the interactive analyzer, or submit your own file for analysis.