Malicious PDF — malware analysis report

Static analysis result for SHA-256 f144ad55094d03cf…

MALICIOUS

PDF

100.2 KB Created: 2021-05-19 22:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7cb27f26ccad59f5119afcae7524acb3 SHA-1: 9a1e4301754a112a04684bd68d1ebb416cb37f20 SHA-256: f144ad55094d03cf13b7e15796dfc31fbe8e14b0997712b3df4f028de07463b2
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware site. The document body, though heavily obfuscated, appears to be related to a physics topic, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=temps+de+charge+d%2527un+condensateur+formule PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444377/normal_6000a26964134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413713/normal_60602f44b7ca4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386366/normal_6016fd727e7bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_600e069d5c69f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387808/normal_5fdb154515908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485813/normal_602293570705a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451355/normal_601fd0812166c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460983/normal_6054f69d6acce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487399/normal_6007d8eab962c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/eac4dbe0-3488-4b5d-9cbf-58ed58b5015b/french_grammar_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/238f4f6e-d9ba-411c-b07f-c696b7c37676/jagiwojisuwida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a602bf-0296-48ca-bcb2-8a03eba2e12e/blomberg_dishwasher_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b8d2d91-4e5f-43c7-baa2-23c63df98b94/14731520534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/729c15ce-a7d3-4241-9d5b-bcb446c1a76a/20565147603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a706faf1-6c04-4c23-9977-302dd073b7b8/metodologia_de_la_investigacion_cientifica_sampieri_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d7d6fde-edba-4c3d-8564-d055919eb297/zesevezesikuvonozefowetil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/365eda25-0dc9-4532-b641-dcdd9584a18f/best_american_short_stories_2020_curtis_sittenfeld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5de915a3-7117-465e-9b6f-b23c0619a0eb/rebibesubupirim.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C0 5388 bytes
SHA-256: 17b61c6c00e9074b6858e60fbd085b1e44d33de469346858bac470e47c50abc4
font_01_sfnt_off000132f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F2 13496 bytes
SHA-256: 26d87aa0ed406693712595f737733175520991b889e4fbf01c9ecc93b89467d3
font_02_sfnt_off00015ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DDC 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449
font_03_sfnt_off0001730b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1730B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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