Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f891620c5497f9…

MALICIOUS

PDF

184.9 KB Created: 2021-03-15 10:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 068bcdcec8e65ae878643e1aa671e49d SHA-1: 94391f529b051a8afd222abb90db735ee45ffd2e SHA-256: 76f891620c5497f9dba4de502c976f87f0c430c1b545a7a2d60fa2d65dd106f3
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic specifically identifies the document's content as a classic advance-fee fraud scheme, likely designed to trick users into paying fees for non-existent prizes or parcels. The presence of external URIs, such as the one pointing to 'kuzutuzo.ru', suggests potential C2 communication or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://kuzutuzo.ru/wix?keyword=stuck+in+the+mud+game+australia
    • http://bamupiwabibajew.mywebcommunity.org/sharepoint_2013_cumulative_update_september_2020.pdf
    • http://lomuwugevona.getenjoyment.net/belly_fat_cure_food_list.pdf
    • http://idem-peshkom.ru/35699633257my2bh.pdf
    • http://mini-cam2.club/1486251723707t0j.pdf
    • https://wotakowa.weebly.com/uploads/1/3/4/8/134885303/9516911.pdf
    • https://zekigoduse.weebly.com/uploads/1/3/4/3/134336209/kuterizasik.pdf
    • https://cdn.sqhk.co/soxuvezosapa/jbaieMv/org_2021_apk_mod.pdf
    • https://guwagigiruf.weebly.com/uploads/1/3/5/3/135303004/5951620.pdf
    • https://cdn-cms.f-static.net/uploads/4379476/normal_6049a7862150f.pdf
    • https://cdn.sqhk.co/patemugimej/gdgj53J/75248951518.pdf
    • http://laxana.ru/aashto_highway_safety_manual_2010okcgy.pdf
    • https://static.s123-cdn-static.com/uploads/4427093/normal_5ffe4fd184dbb.pdf
    • http://suvekitubexeso.getenjoyment.net/565761304.pdf
    • http://gagitevanonuti.mywebcommunity.org/curso_de_piano_para_iniciantes.pdf
    • http://naturaleone.space/12689362136y7d0k.pdf
    • https://cdn.sqhk.co/ranemagesoga/vjc3yid/strategy_and_tactics_in_marketing.pdf
    • https://cdn.sqhk.co/kapimetavis/gcnJhxn/stickman_warrior_2_apkpure.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_73dc2811634d477cadfeb809245c779f.pdf?index=true
    • http://gemovimuwopete.atwebpages.com/bodybuilding_exercises_for_beginners.pdf
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_b3f5a2978c0f439e9d0767d449237174.pdf?index=true
    • https://c63359c4-faa5-40af-ad11-254ddd3d100c.filesusr.com/ugd/838c33_182a44fecc3643ddb96597d561d65dcc.pdf?index=true
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_9f6035caf1dd46b6a9016644eed91c79.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_off00029b33.bin
304cc68eb35032bfca90d394040a8b01e27cd22635fb7d3f030756cc05dac99b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29B33 5520 bytes
font_01_sfnt_off0002adc8.bin
fae9a4855762a678365e5e5f1bd275add3c20dfec0dea1d47ced3b9f852525bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ADC8 12040 bytes

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