Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dfcf08e7128dddc…

MALICIOUS

PDF

63.5 KB Created: 2020-12-03 16:29:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d80eb74c6374c713cd2f253528cf6d76 SHA-1: 1dabe230dfb0619ef9a58a67bef45e4440e53b2f SHA-256: 9dfcf08e7128dddc913e23311647d1fae505590b98442edb5e6691aec13af1d8
184 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of malicious links suggests an attempt to redirect the user to a harmful site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://ggtraff.ru/aws?utm_term=totalitarian+and+authoritarian+regimes+linz+pdf
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5f9942711df14.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/vigirupiruwovilav.pdf
    • https://jujizifij.weebly.com/uploads/1/3/4/3/134309807/walunir.pdf
    • https://cdn-cms.f-static.net/uploads/4386354/normal_5f917468b3b70.pdf
    • https://rafulosuzeme.weebly.com/uploads/1/3/4/2/134234553/8409479.pdf
    • https://kiligazifozu.weebly.com/uploads/1/3/4/5/134506598/8a1819c97f2.pdf
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/felunuwiwe.pdf
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5fb00332b2e36.pdf
    • https://cdn-cms.f-static.net/uploads/4382974/normal_5fbc1ec4e85b6.pdf
    • https://walupufodurutos.weebly.com/uploads/1/3/4/7/134734499/gexiniborad-jabezuku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc0e607df132613bbbdbdb8/t/5fc2e6ab3c6ccf69f3bead63/1606608557930/limobenaxugasafipuvejuli.pdf
    • https://static1.squarespace.com/static/5fc0d4752bbd7406580625ec/t/5fc271523c02f22b9d5bc4a0/1606578518114/46542097035.pdf
    • https://uploads.strikinglycdn.com/files/37302f08-4511-4712-b867-437a005aa341/vapor_pressure_and_boiling_worksheet_answers.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4f3fe18c5c478ef25790/1606373183699/noire_the_nail_bar_lakeland_fl.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe02b93c02f22b9dd3deb6/1606288058080/majestic_theatre_seating_chart_dallas.pdf
    • https://uploads.strikinglycdn.com/files/5131510f-006a-47e4-ad23-0f571711b59f/fawutune.pdf
    • https://static1.squarespace.com/static/5fc0e90c27a199023ab56552/t/5fc16c47e18c5c478e317eb9/1606511688534/wubarakovodajigedi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb56.bin
a3b71006920f961b31c0fa7ffe6795238d8998710602f2e44b249945c0670071		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB56 5452 bytes
font_01_sfnt_off0000cdbf.bin
7ec824d5bc2b3919a7742be688607a9beec079091292259e09c403ea68467c19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBF 10448 bytes

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