Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d97900650dc684e…

MALICIOUS

PDF

65.5 KB Created: 2020-12-08 14:04:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5335e9b2b5e76f69b773baaab6cd2816 SHA-1: 96b850382cecf7eee28d22de3eece3bd91187fe7 SHA-256: 7d97900650dc684e1a3ffcb5ba89e721cd4cd3b3f4206bc9af860f50dff0787c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffnew.ru/123?utm_term=weber+q+3200+grill+cover PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382186/normal_5fa162d33c58f.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/kekabidoba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_5fab36d195f3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f8c4a9348e25.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc70934a3ccef3526e90d89/t/5fcdf0092bc7884852d8eda0/1607331853639/80726626042.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc373c8df132613bbcde1a1/t/5fc41ff0bc819f1cf45a7383/1606688752991/86156394746.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5deed104edf1d77a34246/t/5fcafdd10814be4f73e14006/1607138770118/sumopovebipafof.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd2c30b6b03258f2f7c3b/t/5fc2277b145a8629dcf927d5/1606559612338/equivalent_ratios_word_problems_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3426faffbf90a66f9ae2f/t/5fcece3c55629615614026b3/1607388733437/muletumibunotagow.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fa26e2fce462bc8c54f9/t/5fc5e40f9b1ed03538a9925d/1606804498132/48850365318.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5de1b7848ba205d3add58/t/5fc7031e0623334b0c556dda/1606877983203/world_war_polygon_mod_apk_obb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfad14f98375720a661db/1606286036481/remizupat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffcc36609fd0ee78c2f31/t/5fc1768afa04221c71570af5/1606514315841/jiguzedulumeritum.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3aad26ff1194f72fc70/t/5fc14b8c64571256546b8d39/1606503309680/42723209422.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d00e405d5340f3291e5b/t/5fc0d78f4f98375720ff7c7e/1606473616637/69437663093.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11fbabe9b6939510c2240/t/5fc8ea16fc44f34df66ae876/1607002646305/math_facts_flash_cards_app.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_off0000c1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B5 5356 bytes
SHA-256: 0c922662739645a37a1536d85749c6ee3717cbf12c8f4ae666c9a2ad130041b9
font_01_sfnt_off0000d419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD419 10964 bytes
SHA-256: 0bc38682ff1d5fe30395967a4b87535bd7a29638cfdf4616ba540c8fe21f4ad5

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