Malicious PDF — malware analysis report

Static analysis result for SHA-256 2347e9633cf42e7f…

MALICIOUS

PDF

65.2 KB Created: 2021-02-02 04:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddfd0b0740696512ffd0d24345bb430d SHA-1: 7febd2ad812d49b5d4ec9d31c8ace0a83b3d14d6 SHA-256: 2347e9633cf42e7f94a704b2f931413f0b4b71cf2042f0d78e6eaa52dd49f3b0
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to a 'chemistry of life study guide answer key'. The primary indicator of malicious activity is the embedded URL, which is likely used to deliver a secondary payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=chapter+2+chemistry+of+life+study+guide+answer+key
    • https://cdn.sqhk.co/nugopanage/ojhuT2n/american_off_road_outlaw.pdf
    • http://setefigidoral.iblogger.org/lumugop.pdf
    • http://reawolt.online/informatics_practices_class_11_notesc2s0v.pdf
    • https://cdn.sqhk.co/fedovusig/ibDgg3O/33518312713.pdf
    • https://cdn.sqhk.co/kizusuvut/jheOhhy/79656078821.pdf
    • https://cdn.sqhk.co/nomavunut/eTLqXgc/37513694985.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dinilederu/bumper._io_mod_apk_no_ads.pdf
    • http://jiwepatifon.rf.gd/galaxy_beam_projector_android_phone_online.pdf
    • http://vuxalono.epizy.com/68430246780.pdf
    • https://s3.amazonaws.com/dojonuta/chibi_papercraft_template_maker.pdf
    • https://s3.amazonaws.com/dazemi/76870278170.pdf
    • https://s3.amazonaws.com/bovenotojitowe/15824780956.pdf
    • https://s3.amazonaws.com/mogedozara/tokerute.pdf
    • http://zarenubopopo.epizy.com/background_png_file_free.pdf
    • https://s3.amazonaws.com/fedure/seventh_day_adventist_church_manual_2019.pdf
    • http://rivowotow.epizy.com/90262579281.pdf
    • https://s3.amazonaws.com/tozaduliwubega/kapigawawazamiwezomowilaw.pdf
    • https://s3.amazonaws.com/liwara/87846066176.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0d5.bin
778cf1498d89a425bb414489d9e6a504f8d500762962db2bde01cc45fc741826		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D5 5864 bytes
font_01_sfnt_off0000d4b8.bin
9508a07a7e1c7ddf6bdd0fba2f80f7ba8c6cc8452470e50b2768b96d8826fa68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B8 10428 bytes

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