Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cee8ff1a26f7440…

MALICIOUS

PDF

82.6 KB Created: 2021-02-02 13:07:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8ec6f1e830ccfbf12929cf02c3967937 SHA-1: 6fde005b5688b44fe53e6703416e622e8073c1b4 SHA-256: 5cee8ff1a26f7440b50d4b940fe0df6fbcb86b6afb776953e5af68e819317b3e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://druttle.ru/aws?utm_term=online+android+mobile+antivirus+scan', which is likely part of a phishing or malware delivery scheme. The document body, though heavily obfuscated, contains text related to an 'Online android mobile antivirus scan', reinforcing the lure.

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://druttle.ru/aws?utm_term=online+android+mobile+antivirus+scan PDF link annotation
    • http://cloudplay.xyz/directors_treatmentifkf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477651/normal_5ff8774654ad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469351/normal_600c2979c0244.pdfIn PDF document text
    • http://1gusevshop.space/47554797395gdnh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489429/normal_6008a265bd4d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_5fe8aaf99608f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/zavavosunuvevujirub.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/stockholm_city_guide_guardian.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/pectus_excavatum_deformity_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/html_important_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/mehndi_design_video_songs_free.pdfIn PDF document text
    • http://sivakekixil.epizy.com/dafutizu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EC 5196 bytes
SHA-256: 45f78038d111b19c9d53ec695bca3a417c78e29029d8b219af35fbfcd6487221
font_01_sfnt_off0001097e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097E 10984 bytes
SHA-256: fed59727211b35676c2dca922297c89580681a148a229863343b3e08d49bea14
font_02_sfnt_off00012ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34