Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2e964f3d2f2bb6…

MALICIOUS

PDF

62.4 KB Created: 2021-02-24 02:04:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: e0e40c5b260b561948c60c20940f2382 SHA-1: 7847e7363abdf0be96667895504c7564c7bce2f5 SHA-256: 4b2e964f3d2f2bb6edb9716307f50fadda786c53c218655fbccfa294f4b38c34
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=5th+grade+informational+writing+samples PDF link annotation
    • http://opit.space/ias_38_full_standard2p1z9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457330/normal_60214d27d8bbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379369/normal_5ffb408e2aa55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461232/normal_601cbf735ccef.pdfIn PDF document text
    • http://xviiivbgz.com/what_is_the_starting_pay_at_mcdonalds_20208w5qh.pdfIn PDF document text
    • http://meetlait.pro/86958675394auh5v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449424/normal_5ffffc71ee4ab.pdfIn PDF document text
    • http://avbox.org/jd_salinger_bananafishcen1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_602eccd56e9bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_5fd347b714ca6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366654/normal_5fcd31f6bb883.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473322/normal_5fe27867ee538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376629/normal_60289191473b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387566/normal_5ff286a318689.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/nowonovege/39017483912.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/mazozapuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/rrb_stenographer_syllabus_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/34893523688.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_off0000b8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A6 5576 bytes
SHA-256: 08724b139abbe990b468f869b296b7968258627ee18c76a5f48ddee9c43d554b
font_01_sfnt_off0000cb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8A 9716 bytes
SHA-256: ea1b72855a09938ca694f3fc44d70f24cce54aa7d13da52b1a9774bb61bdc5f8

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