Malicious PDF — malware analysis report

Static analysis result for SHA-256 be732a17bfc1940b…

MALICIOUS

PDF

76.4 KB Created: 2021-02-09 14:49:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1488f7dabf560c479ae416787bb57769 SHA-1: 8123ffd65ddaa9538e323a602c256c7fff765a7b SHA-256: be732a17bfc1940bc6bb9bd12593b56da15e616708f89d9911298cfd8568a341
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely intended for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wb?keyword=never%20use%20contractions%20in%20formal%20writing PDF link annotation
    • https://cdn.sqhk.co/wisivelu/GB4acgd/61118516093.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/ao5QtGj/7024537816.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/EigjeuG/xorakaxitafenoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470035/normal_600d1402b0fbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468812/normal_5ffcab94ec0d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382003/normal_601cfe5177e16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477386/normal_5fdfa6e1859c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369659/normal_5fff2abdce390.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485696/normal_5ff54fd3a53bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444358/normal_5fe549c2228a4.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/xufujofaleki/pigasokogupagixamuluzuf.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/31657527261.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/free_cute_baby_dolls_images.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/jamig.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/infancy_narratives_comparison_and_contrast_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/wuzisufa.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/edible_plants_in_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/17957539759.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_off0000ecea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEA 5324 bytes
SHA-256: d5d83c8796e3b3345a856fbbb0631c932873030eadae2354c8e14725168bdecd
font_01_sfnt_off0000ff13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 10948 bytes
SHA-256: 03af8b26d5d676751b3fecb648fee2e15eb66ccdde866d3f51c9a8d6c3417611

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