Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87336e9661da3c4…

MALICIOUS

PDF

55.7 KB Created: 2021-04-02 23:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 02224df739e1cf8ac6a38b93532e833c SHA-1: e6a1f8424f69cb30398ff30ef20fe5c72cc41daf SHA-256: a87336e9661da3c4e98c43a860f29efe5af297861e0b41b43817841f8c67edd0
242 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8382

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://yafferge.ru/award?keyword=american+hybrid+a+norton+anthology+of+new+poetry+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4444358/normal_6032744d93da7.pdfIn PDF document text
    • http://fevevafo.medianewsonline.com/74513385048.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/bsc_nursing_syllabus_inc.pdfIn PDF document text
    • https://wulukisogexoz.weebly.com/uploads/1/3/1/4/131438059/bavugose.pdfIn PDF document text
    • http://vavazexowupex.medianewsonline.com/gogazanoxaxewaxewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408851/normal_6028ed8c6755c.pdfIn PDF document text
    • http://ruvinowuge.scienceontheweb.net/fumixojupekakiguzezolem.pdfIn PDF document text
    • https://rotugufe.weebly.com/uploads/1/3/5/3/135315725/folupilidawuzu-totitozuwosowit.pdfIn PDF document text
    • http://rasipafus.getenjoyment.net/rc_plane_design_basics.pdfIn PDF document text
    • http://fosavaxenu.mypressonline.com/bamu_bsc_biotechnology_syllabus.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/hp_laserjet_1100_printer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_5fe90fabe653f.pdfIn PDF document text
    • https://tokuguzeg.weebly.com/uploads/1/3/4/4/134464653/416500.pdfIn PDF document text
    • https://tinuxitimo.weebly.com/uploads/1/3/4/7/134748051/4191273.pdfIn PDF document text
    • https://buzikapafopix.weebly.com/uploads/1/3/4/3/134375334/eefa60.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/full_marks_guide_class_8_dav.pdfIn PDF document text
    • https://43e3b293-20b6-4b74-9f7d-0eefffb4d2df.filesusr.com/ugd/11595e_7b4d2e207add4173b87a62dc7ddedc4b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/dell_poweredge_r710_service_manual.pdfIn PDF document text
    • https://b3a8b944-ddec-4d17-9b53-5a1c05c66d8c.filesusr.com/ugd/314503_371143bb59ff446a9a84abbaa3582f2d.pdf?index=trueIn PDF document text
    • https://f6b99bba-f064-431f-ab68-6eacb91b2703.filesusr.com/ugd/35e1ce_d4cc59e8414048bd830656c57f54c710.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/funny_questions_and_answers_in_kannada.pdfIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_ab06443a46c44f599d77a360cc6b7807.pdf?index=trueIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_1c8c1322cbe84775ac4dfe9d0551543a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/92173691271.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/wakikagafefupip.pdfIn PDF document text

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