Malicious PDF — malware analysis report

Static analysis result for SHA-256 38cfd48df82cdc1f…

MALICIOUS

PDF

98.0 KB Created: 2020-12-26 18:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c8bb7b05853b5a1d4c60964931e2af3c SHA-1: 941265ef6e987dc3aeb58b25b80b981a3d7b52d6 SHA-256: 38cfd48df82cdc1f1d5767a24b4ec2e6f99da52fbd0b6fe4f6637e507159287c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing lure disguised as a study guide.

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://traffnew.ru/123?utm_term=blue+letter+bible+jude+study+guide PDF link annotation
    • https://cdn.sqhk.co/xowuzaseku/hijgvgg/dash_colors_python.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/ecWQgjt/carnivores_dinosaur_hunter_3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444358/normal_5fa8557b907d9.pdfIn PDF document text
    • https://cdn.sqhk.co/biloriput/SaCAkXd/audiotool_app_ios.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480904/normal_5fcb90303abda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_5f9291421f932.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/jheCxu4/wixuwowukawatunafixawuv.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/jjjiEgf/34562877264.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxisilogok/jdgjJic/plants_vs_zombies_free_download_mac.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://uploads.strikinglycdn.com/files/53b19439-69e6-489d-9bf1-c7b1afaade55/51532501665.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/xirogexexok.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/bootstrap_4_admin_template_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/50827038926.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_off00013788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13788 4816 bytes
SHA-256: 9ad0e24172e638ce3b2b9ab1a4f7190903631f25fb8944b8e7cb33fd97f1864f
font_01_sfnt_off00014804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14804 10768 bytes
SHA-256: 5fcd132bbb0eaba9ecf18ad00cbb76af2d88599bed24fff5eb0f87861a6bc9f9
font_02_sfnt_off00016cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CC5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378