Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffbbb576eb1c69b2…

MALICIOUS

PDF

80.5 KB Created: 2021-02-26 15:19:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 97f42ee1e7a1bcc1c1c075d5b0779880 SHA-1: 6c067e49ff82cb47bb2ee9b34b18aa2e08462f19 SHA-256: ffbbb576eb1c69b2b78a29070c8da6639d4f838b51d962acba5522ead076830d
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to a 'user's manual', indicating a phishing or malware distribution attempt. No scripts were extracted, but the presence of external URIs and the high confidence detection scores suggest the PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/award?keyword=2015+honda+crv+user%2527s+manual PDF link annotation
    • https://cdn.sqhk.co/janezewufaj/gjhbj0a/national_geographic_channel_live.pdfIn PDF document text
    • https://cdn.sqhk.co/lidabofob/cN3eLhb/thief_master_thief_edition_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/joC1jcv/radiology_near_me_bulk_bill.pdfIn PDF document text
    • http://noverst.xyz/what_is_visual_analytics_in_business_intelligencebypcc.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/uyfhggi/sunejelevesib.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/hhSrhiB/3d_sandbox_game_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/worenora/9jdjhie/deus_ex_good_cop_bad_cop.pdfIn PDF document text
    • http://insitemonitoring.com/kininuvobajewosorebeganesvsy0.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/70879664385ip46u.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/jcghZkw/riverside_drive_thru_galion_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/demanajinu/hdrCRge/vemitu.pdfIn PDF document text
    • http://stebsmeh.space/ruger_p95_complete_disassemblyoh2x1.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/kikunojulejuj/gigitud.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_off0000f132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF132 5384 bytes
SHA-256: edd124b8a3688f0180f5731ed3ea310e1e45f1b114b26e48249861aae71bad6e
font_01_sfnt_off0001034c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034C 10428 bytes
SHA-256: 0bb32772128809aa06c8d35f17c75e8d468a921ad513a10bb6ce05078a9bf56a
font_02_sfnt_off000126ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EE 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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