Malicious PDF — malware analysis report

Static analysis result for SHA-256 47804b9e34189830…

MALICIOUS

PDF

80.2 KB Created: 2021-01-11 09:57:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b9719adff4500d1e355b505de598f706 SHA-1: 6affb01528be0276a99e8e8faf50d922e01850f3 SHA-256: 47804b9e34189830a7674293fd41a6100966af0674b58f19ae2ccf98faeaa7f8
96 Risk Score

Malware Insights

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

The sample is a PDF document that contains an embedded URL. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL, https://trafftec.ru/123?utm_term=capresso+disk+burr+grinder+manual, is likely used to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated and appears to contain metadata rather than user-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://trafftec.ru/123?utm_term=capresso+disk+burr+grinder+manual PDF link annotation
    • https://cdn.sqhk.co/disumuneriva/vC3iegi/vusefudalavon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449788/normal_5feb5594d4292.pdfIn PDF document text
    • https://site-1175227.mozfiles.com/files/1175227/wumirapale.pdfIn PDF document text
    • https://cdn.sqhk.co/nepasibuta/KiaQjiI/mx_pro_3_mouse.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503578/normal_5fc61336e80f3.pdfIn PDF document text
    • https://kepelawurolunuz.weebly.com/uploads/1/3/4/0/134017158/jofuzarenap_nirubutape_jexitaxoj.pdfIn PDF document text
    • https://site-1168299.mozfiles.com/files/1168299/bodijaduwisuvali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5fe75204cb48e.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/kudowo/animal_cell_organelles_quiz_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/tapod.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000113e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x113E2 19128 bytes
SHA-256: f3477577d6c3667276de70fd8a72e58a067109bfe3992776ceb0ff63f4ba73b2
font_00_sfnt_off0000dc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC21 5388 bytes
SHA-256: fe8c8fae1011cacbe9566ffbc5babe380f58ed26314bf4b90940d59ac45665dd
font_01_sfnt_off0000ee56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE56 10984 bytes
SHA-256: b3e868ca274b36a1ec74da1d0514940013b1a3978755ed41fe58bfab5701c1c8