Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c6c0a145e844bb…

MALICIOUS

PDF

97.5 KB Created: 2021-07-26 04:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2565297e91c16a5ffffec56c194f0713 SHA-1: edf0b4766d1160fb555870b895791750507e85e7 SHA-256: 17c6c0a145e844bbb0a117a23f5dc820f84d3f5524ab30a201f9455e00fd76a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised WordPress upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely attempting to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/eac1f9df6c8c8e5eeefb67bba1aebce4/68337207397.pdf In PDF document text
    • http://elsekmont.eu/userfiles/file/61364447754.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/duduxevibameguvukejarova.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/j47120e0c1uc94k5ikdte46l93/87948985222.pdfIn PDF document text
    • http://cga82.com/admin/File/55042495813.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/40989efc518d27dbbd9ba3ac0c2fc5f8/puzoxaxikewux.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e816fbb2dd0---35846674432.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/8d4917ae7b41d0b0d3f19c67817fc0eb/dusigawanegiralewikizib.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0d06d4560---tegigarurul.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/773d6398e209f5325e5ab5c8fa4bf4e0/40036959386.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/b56d483152966eaa5ff2943d4edb2cbd/tedanituju.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/5386c380a737956f51bfa6fb5d0da1ff/59131061494.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/34743584875.pdfIn PDF document text
    • https://olterus.info/contents//files/nawosij.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1681eb7a1---tawigejijoragivava.pdfIn PDF document text
    • http://epmachine.ru/d/files/minejorizase.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/bas849iquqf7pkff88q17agq47/dekixarefozixuxovakotomox.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/43516065912.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c60de3b61e4---13340580059.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/bazatamone.pdfIn PDF document text
    • https://hoongnau.com/upload/files/47671046953.pdfIn PDF document text
    • http://lakes77.com/clients/47041/File/11074862793.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=annabelle+2+full+movie+download+in+tamil+dubbedPDF 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_off0001186b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13082 10740 bytes
SHA-256: b1af08fef87ae03da4596993e05636a49909beb00e0def99669a2ada6360c837
font_02_sfnt_off0001494e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1494E 17132 bytes
SHA-256: 488c8a37dff1f0c7fa984f4a64fbc0dd3533ff8a99f9257df93f70991b77e66d

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