Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa1327e803019fb…

MALICIOUS

PDF

77.7 KB Created: 2021-03-14 14:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14f3c4a52e42569f9dde32644196a3b4 SHA-1: e6c30fdf7b402274229f20ff7cf4ecb95769a25b SHA-256: aaa1327e803019fbaff45058d9cb839c035f4780071f4d12202c38c6ee648d6b
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://midufefew.ru/award?keyword=bangalore+city+map+download+pdf, suggests a phishing or malware distribution lure, disguised as a map download. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/award?keyword=bangalore+city+map+download+pdf
    • https://cdn-cms.f-static.net/uploads/4391921/normal_602c9effb5ac7.pdf
    • https://static.s123-cdn-static.com/uploads/4455673/normal_6007d4d273cee.pdf
    • https://cdn-cms.f-static.net/uploads/4427295/normal_5fd92fa4af5d4.pdf
    • https://cdn-cms.f-static.net/uploads/4406782/normal_603446112e1db.pdf
    • https://static.s123-cdn-static.com/uploads/4414871/normal_5fce78f0b4f26.pdf
    • http://ninomut.sportsontheweb.net/nursing_care_plan_for_neonatal_jaundice.pdf
    • https://static.s123-cdn-static.com/uploads/4479470/normal_5fc744f562b2d.pdf
    • http://kewokuxumuzig.medianewsonline.com/nitrogen_fixation_in_leguminous_plants.pdf
    • http://penageli.getenjoyment.net/biscuit_recipes_book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/995e38c7-bc1f-4559-8060-c5d6def31886/64966620585.pdf
    • https://uploads.strikinglycdn.com/files/101904cd-9638-457f-9f9c-7d9413888b6f/is_the_choice_on_netflix.pdf
    • https://uploads.strikinglycdn.com/files/b50bf049-6e55-4ed0-aca1-720c47b8d799/tewojaradewit.pdf
    • https://uploads.strikinglycdn.com/files/66b6904b-ba0b-43aa-8f9d-d559f6bdfc1f/lovinaremejibejevajit.pdf
    • http://nibemodida.myartsonline.com/proposal_skripsi_akuntansi_biaya.pdf
    • https://s3.amazonaws.com/mupukesunobaga/bolen_riding_lawn_mower_blades.pdf
    • https://uploads.strikinglycdn.com/files/a30b7722-d6e5-485e-acf0-05770a174f18/15297515426.pdf
    • https://s3.amazonaws.com/dogazisuze/derek_prince_ministries_charlotte_north_carolina.pdf
    • https://uploads.strikinglycdn.com/files/c34d72df-2f62-4ab0-b9f3-f79915c4ffbb/3_metros_sobre_el_cielo_serie_reparto.pdf
    • https://s3.amazonaws.com/posufij/39149138064.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1fb.bin
7f42459637e126e53b4161b588eb1bb5e05411da319d3ff162d31e7e112529fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FB 5540 bytes
font_01_sfnt_off000104df.bin
9d5e4ee77e79602edfc4a63a656e4f65cdc6dcebaf419d38a64758e02b44af27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104DF 11020 bytes

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