Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39d7711d6a7e80d…

MALICIOUS

PDF

81.6 KB Created: 2021-05-21 04:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f6b41ec71d22a06f47f26deb6189d5f2 SHA-1: 38349b0c11e3855dba5b716a9b925547af14409e SHA-256: c39d7711d6a7e80d6a1ed702a02a91234af448a06035e98c130bc46867d7c14b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely intended to deliver a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the phishing lure.

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://baarspo.ru/strik?utm_term=mecanica+de+materiales+fitzgerald+solucionario+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485435/normal_6013a31d8f9b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383798/normal_5ff140e67fadc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448992/normal_6061236a26a99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/takateg/fopoxuj.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/guitar_chords_for_hymn_book.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/88000909856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6d7f4e-3890-42a3-a1eb-db4319c36cc9/kaxixupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd51c424-000e-47d2-b3ad-40745e1d4a0b/29137476522.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/how_to_use_bowflex_revolution.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/pre-_algebra_math_worksheets_for_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/51928562424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff44fa61-58d1-41e2-91ca-3523e0e84b16/veronika_decide_morir_paulo_coelho_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/bmc_full_form_in_dairy.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/nifenos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d6ae02-bf09-451e-a529-86321f0bda76/zuwoligilapabaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76940e8b-3e4d-4435-bbe4-c253b8c6469b/19975522996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d4d4861-6a53-463b-970b-6760dd5eb662/lowrance_hook_5_hdi_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c86f20-0496-4626-8314-ec7f3b28b0a8/8670510347.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/android_emulator_freebsd.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/tadazubomomeza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69d10013-1d04-4b99-b148-6afa97a959c7/wugivikewezogejivasemod.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/mandate_letter_sample.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB84 5528 bytes
SHA-256: af66731d2daf758f46def3c4446a51c68814a128d1d897e226bb048437ae12c0
font_01_sfnt_off00010e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E50 12412 bytes
SHA-256: 408356510c98301266427950ef4c50081e5b3b42b6957d0d9977b1df59edb62f

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