Malicious PDF — malware analysis report

Static analysis result for SHA-256 22015740306b934a…

MALICIOUS

PDF

124.7 KB Created: 2021-04-01 16:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c8ba0a44922d9df5d431962cb0e6e77 SHA-1: cfba71c033d0d7ccca3f7b7ee97cfffe6c38c945 SHA-256: 22015740306b934ac3211ff5acf27e53d1bd6637cc53167c1cba0989e7c06f96
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF document exhibits characteristics of an advance-fee scam, using language related to Nigeria's cashless policy to lure victims. It contains an embedded URI pointing to 'dafemum.ru', which is likely the initial stage of a phishing or malware distribution chain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the execution of embedded JavaScript to further compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=nigeria+cashless+policy+pdf
    • https://teguvazotumeli.weebly.com/uploads/1/3/4/0/134041540/xifefapugexudaja.pdf
    • http://file-id.ru/goldmark_report_nursing_historyyjoao.pdf
    • https://kuxiwapanipajof.weebly.com/uploads/1/3/0/9/130969705/f405fc99b7.pdf
    • https://cdn.sqhk.co/fanasuzajem/sNgeb2Z/nujiwidoraxudo.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • https://cdn.sqhk.co/nutewakizi/jia6H24/19652485809.pdf
    • https://jajonugofetafis.weebly.com/uploads/1/3/0/7/130776034/525e0f1be.pdf
    • http://kunutudusoxa.mywebcommunity.org/butchery_business_plan_south_africa.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • http://koteyarn.moscow/place_value_chart_free_printableew96o.pdf
    • http://kogejirupu.getenjoyment.net/debufoda.pdf
    • https://cdn.sqhk.co/wepurodapike/dWgfsjg/resident_evil_movie_reboot_2020.pdf
    • http://xorabawik.medianewsonline.com/26197395959.pdf
    • http://swast-group.website/necromancer_eso_build_2020z3vk0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/46a866c6-5776-47cd-9276-5e564f846ceb/xivexolefisaro.pdf
    • https://uploads.strikinglycdn.com/files/df691b4e-16b2-4f00-bd3f-d0f90f4778af/69157197703.pdf
    • http://desejole.myartsonline.com/61295946807.pdf
    • https://s3.amazonaws.com/remufuzu/51253367299.pdf
    • https://s3.amazonaws.com/pasutiz/97784322007.pdf
    • https://uploads.strikinglycdn.com/files/e4e58aa8-62e9-4159-95cd-c441180a14c6/fofexuzezavarapugekati.pdf
    • https://s3.amazonaws.com/lanorolowu/inspector_calls_context_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/2ebef469-364f-4ddc-b772-327588898c9b/polk_audio_psw505_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/e8f5ad4e-1bf7-46e2-b7fe-04127b6fce15/excellence_playa_mujeres_cancun_honeymoon.pdf
    • https://s3.amazonaws.com/dikobepibelun/62641659412.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019be1.bin
0a2226ddf54be4ffbe1ff9c5fc4baf23a9636fed48df64c8bdd26d5ab0a69719		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19BE1 5088 bytes
font_01_sfnt_off0001ad49.bin
4c2afab88757ca689495967fd96009d1332d3557407b8d9ce0b904fa1eb09853		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD49 12376 bytes
font_02_sfnt_off0001d703.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D703 4324 bytes

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