Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0c0edc08e23918…

MALICIOUS

PDF

76.2 KB Created: 2021-02-16 02:33:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3b5442701e2eb491d51faff2a01e2c59 SHA-1: 198cb5ee93659cadbd2de6c2c75d49025530738c SHA-256: eb0c0edc08e239186ad798b62e888203ebf3e7e4fd81ea01e1a9f5f0d9bb9a09
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. While the document body is heavily obfuscated, the presence of external URIs and the strong heuristic signals suggest a phishing or malware 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://jacksth.ru/123?utm_term=how+long+do+mini+split+systems+last PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459805/normal_5ffda7736928a.pdfIn PDF document text
    • http://anyita.space/sixexanosur7d65.pdfIn PDF document text
    • http://gogodolajukapob.22web.org/fifiviludosujerituxofafop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5fd67c45b76a1.pdfIn PDF document text
    • http://basiditdcf.space/residential_lease_agreement_templateu1wgo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492600/normal_5fcdcc590e7a8.pdfIn PDF document text
    • https://cdn.sqhk.co/nomazotesi/ibchijf/download_game_stormblades_mod_apk.pdfIn PDF document text
    • http://zoomita.fun/butudoketabowupeme90do.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_60114cf22c22c.pdfIn PDF document text
    • http://ita-yog.space/asset_based_information_security_risk_assessment3n2zk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500200/normal_5fdfd426c4ad5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388160/normal_5fdfcc30e6eba.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/CijH6DZ/30799759543.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://butadiviwev.rf.gd/hf_acid_safety_data_sheet.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_off0000ec26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC26 5336 bytes
SHA-256: bb97a4493f4fee9331c45fd306d8aea53f4fe099b1f0543e913ada6c35513032
font_01_sfnt_off0000fe5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5B 10932 bytes
SHA-256: b4d6cdd6e522ed2adfa43dbe7768b2d9149dab9792f9742676e5d67480b3de65