Malicious PDF — malware analysis report

Static analysis result for SHA-256 340bcd9a9ee7f75d…

MALICIOUS

PDF

74.9 KB Created: 2021-05-23 04:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9407f14fcc31ce496ec6a7d45dc35467 SHA-1: d7b96957865b06e02b797a00093dd95758b413c1 SHA-256: 340bcd9a9ee7f75d2b7141d6684838c2c390c8bf4955c398183177bf1cb116bb
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to an academic exercise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/strik?utm_term=exercice+corrig%25C3%25A9+circuit+en+serie+et+en+derivation+5eme PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421366/normal_60065377e04df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414695/normal_60502b8f34796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459029/normal_5fee413ade705.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468286/normal_5fee106203ba8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456114/normal_60109ebb188f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451035/normal_5ff8edaa62c6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491927/normal_602c2d9dbe91a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a8fc81-32b9-439b-baf1-a5946fced56e/13797131899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af62458-0342-4a02-84bd-8c5820b8a072/plotting_data_on_log-log_graph_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74cb64af-c48c-4ffb-9737-7436858381a7/lol_spirit_blossom_ahri_chromas.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/5_3_bank_login_hsa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ab591f-a2b8-41dd-ad26-47ca81dff549/30430412706.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/the_house_of_spirits_chapter_4_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3206780-92e5-4881-ae29-95d682263f9a/67043481778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/708bc815-0cc7-43d4-9e34-3fb1733fb7e3/99776302717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721ac573-e1a3-429c-ad07-d87b00ef3cd7/wenuvixasujurolazovatat.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/bisuwetov.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/75539601002.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/connecting_auvio_bluetooth_headset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b02d3f-b9de-4158-8878-d3f940ef0d41/wuzeximisebimet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dba76d3-5bdb-4d4d-8621-6da470abb30b/what_is_cos_180_-_theta.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/crystal_report_server_runtime.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/63437335194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ebc1a4a-72e3-4a6a-896f-fcdd985a28e9/mumajide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AF 5576 bytes
SHA-256: dbc4a694e0a4e19acc4ae353fedf44cb3f02260516d99f6a6ea7d11f8dffdffc
font_01_sfnt_off0000f463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF463 12248 bytes
SHA-256: 23bcfb445ff2338c04fae91a9f0e40e3065005724053dd8c10d40677f80958fa

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