Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6f5b508a37314f…

MALICIOUS

PDF

77.6 KB Created: 2021-03-10 21:50:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 529f7d18198ef35d36f70c27d2a7a1de SHA-1: 7a51b1fac0e34dfdde54283bdcf7f13c8592f9bc SHA-256: 8c6f5b508a37314f5bf61e66a09406b37527225e2e18d25c53555fc3a8f92edb
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by a machine learning classifier and ClamAV. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI indicate an attempt to redirect the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/award?keyword=importance+of+authentic+assessment+pdf
    • http://easylearning.space/chevrolet_bolt_review_consumer_reportsxvw71.pdf
    • https://cdn.sqhk.co/genopeno/dgggiX9/easy_load_motorcycle_trailers_for_sale.pdf
    • https://zefijevizo.weebly.com/uploads/1/3/2/3/132302816/jusok.pdf
    • https://static.s123-cdn-static.com/uploads/4445877/normal_5ffd07389caa9.pdf
    • https://cdn.sqhk.co/lisupixiwe/hSRnXYW/tubby_todd_cradle_cap.pdf
    • https://ludurodeb.weebly.com/uploads/1/3/4/8/134852143/4908f15.pdf
    • http://vipadminler.org/logical_reasoning_questionsm8kac.pdf
    • http://sigevomub.22web.org/how_would_you_describe_the_moon.pdf
    • https://cdn.sqhk.co/nugopanage/sS1hhdc/pumpkin_jungle_adventure_world_rehoboth_beach.pdf
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/fazofuvap-duwamalodos-zewezakatilox.pdf
    • https://cdn.sqhk.co/tipusuzog/88Rhhii/caponata_siciliana_ricetta_veloce.pdf
    • http://thesimplycompleteseries.com/32926783133p511b.pdf
    • https://cdn.sqhk.co/kewusikata/4hegigd/voice_translate_chinese_to_english_online.pdf
    • https://cdn-cms.f-static.net/uploads/4417129/normal_5fe92f17da04d.pdf
    • http://asta-stroy.ru/how_to_get_free_riot_points_2020vdwcp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_392114fb2dde4e7e890bd2943e42678d.pdf?index=true
    • http://wilopomuba.epizy.com/wooden_block_puzzle_app_for_android.pdf
    • http://datufubizut.rf.gd/declaration_of_trust_template.pdf
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_a88830497c5a4fabb742891f5e24d8b4.pdf?index=true
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_cc86ce611227424aa1acc8c12e4ce032.pdf?index=true
    • http://silapopo.epizy.com/cyberpunk_2077_release_time_usa.pdf
    • http://luparev.epizy.com/vidmate_apps_install_2015.pdf
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_72f1931e6e684e339c4be3890c2d58ce.pdf?index=true
    • 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_off0000f62c.bin
c0fd0d6a7ebbc1c119cbe696027031e487f08ae562eadea43cdf06eb078b5eeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF62C 5300 bytes
font_01_sfnt_off00010804.bin
7c53bfaa6ec71468f63d531dc60656ea125b0217c8eb4d403d437de8ecf93e55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10804 9668 bytes

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