Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2cd78fbddb2cf1…

MALICIOUS

PDF

81.3 KB Created: 2020-10-27 22:21:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: dc91a7de9c2a41a7880c98c93572f7a2 SHA-1: 73f472fb30eef59b2d3063cbd68448f30788c8f8 SHA-256: 1a2cd78fbddb2cf114b70dda23c584f9a6f465140e12de2709e9c70fce33c3db
102 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Intex ultra frame pool instructions', combined with urgency language, suggesting a phishing attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cctraff.ru/strik?keyword=intex+ultra+frame+pool+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f8eeff14c8a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f95ba80b67af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394061/normal_5f92510469043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f96b7d42ac09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f87151997292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_5f8ef89cee684.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/the_animator_s_survival_kit_by_richard_williams.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/madibirugenusetibeva.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/psychology_101_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2903cd-ea95-4a18-bfd6-d6a2f1470b0e/1980245165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b240a321-0f3e-4c0f-b23a-7f08cf70d80f/23151935814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a7e217-a05d-437e-9555-d0f72597a44f/wagamulixorozibobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a038917c-15aa-4dbb-962a-5f37645ac7e7/lasinivutegeven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8d361c3-da09-409b-98b8-ba06f555a770/61537792846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c6a93b-6c14-499b-8234-fc60e1816547/68975644724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/754d9b0f-ca43-41b8-b456-43a8c540f388/mini_push_button_switch_4-pin_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d30e5f54-88d1-45d2-b5fd-2de863934f70/lowebevib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03722fdf-98b5-4bbb-8be6-223ad823eb8e/boxinewobizilixofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cb33aa9-1ffc-4c4d-ab0b-f73c170efe1e/rodifaner.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/mafujobevapile.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/cds_syllabus_2019_in_hindi.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6B 5164 bytes
SHA-256: c67f923494162f453014af90339be82d39b57f3d640a51351e1d5a46d0d2c2e5
font_01_sfnt_off00010be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE1 12680 bytes
SHA-256: 8170270fea8ab20f62c9239d7cd9ca190229ebce8d03fe5e31d2732c1a2a2ba9

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