Malicious PDF — malware analysis report

Static analysis result for SHA-256 277a0a02385b596c…

MALICIOUS

PDF

86.4 KB Created: 2021-03-16 18:31:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 7b817d918b83c6a09b646d52da3ed2b8 SHA-1: 6cff15c1cabf67e993181e865389af2940ae814f SHA-256: 277a0a02385b596cc45aeb46eb251d9124dadbb5a934f1e43bd6ed319c3ab167
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a URL that appears to be a search result for copyrighted material, suggesting a lure to download further content. The presence of embedded URLs and the nature of the detection point towards a phishing or trojan distribution attempt.

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://seumenha.ru/wix?keyword=goodnight+punpun+volume+1+pdf+download PDF link annotation
    • https://cdn.sqhk.co/pefapalotux/Ljh4VLj/how_to_apologize_for_late_reply_formal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392877/normal_5ff31d735e39a.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/jjAhhrD/23213207681.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/YkgjHji/56084911019.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/gApvlsM/zomipufuwidawawufenixa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496597/normal_6048c07b5243a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_603b48f0b289c.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/petubapizo/98474752066.pdfIn PDF document text
    • http://vobulag.rf.gd/how_much_oil_does_a_toro_snowblower_use.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/galleria_borghese_get_your_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/90538952304.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/formation_analyste_d_exploitation_mvs.pdfIn PDF document text
    • http://lipojutezudu.rf.gd/69858222967.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/resuzevexefakazezo.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/18429637323.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_off000111e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E0 5416 bytes
SHA-256: a0417b26322bd0ae1b9303eb6166c19f3479f9dfd94474409150fc369a49bcd6
font_01_sfnt_off0001244e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244E 12028 bytes
SHA-256: e6e3d82ba521ea549e9159372cdcf466caf4d7f6f697a253c079a7bbe287c79f