Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4b86ab3343d8a1…

MALICIOUS

PDF

70.3 KB Created: 2020-12-19 21:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5429644d5bcd828ee0cee542fbb27dce SHA-1: 19e7ccc694fc36b4204c81018691924dad25b0cb SHA-256: 5d4b86ab3343d8a1e3bbce986dc5d3772273bec55763ba2d7f2d8420937b23da
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'traffset.ru' was extracted, suggesting a phishing attempt. Although no scripts were directly extracted, the PDF structure and the presence of embedded URLs indicate an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=make+analog+synthesizers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447251/normal_5fa3ed002b878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5f96ec811ba08.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/xeponodij/47857172901.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/sam_cengage_project_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc112c117e7202640eb3140/t/5fc141b95147b14804619b17/1606500794106/james_alliance_guide_20-30.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcb77cc464b41678cc2762/t/5fdd20a34faf9b3562c5d3f5/1608327331860/nefirenebeloxi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0da75085bf90c0efcd65a/t/5fc33c5908845d0924f29ce7/1606630490979/9319485489.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/kixuzawomeb.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/ladizotavo.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/imitate_their_faith.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/7804933499.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/lufetojadetulasipitotobuw.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/wizalufopujimuwelo.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/11592090538.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_off0000d6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DD 5524 bytes
SHA-256: 419d00d04b2268f977cf7addb0ee847e6754351c62bd3abe1d24721ede88f86f
font_01_sfnt_off0000e9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C9 10172 bytes
SHA-256: a9631bab38bc250712422cb513072de2c47ae4a467f3207bb7cc5c31d954e653

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