Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbaee3523231c1b2…

MALICIOUS

PDF

85.1 KB Created: 2021-06-09 09:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4214cf4c3d846a63cbbe91fd1dae3cd4 SHA-1: aa87a116e4a977ee61b5f0082f3b2105eb81e295 SHA-256: bbaee3523231c1b27edea5a614b93668512191182dfb3af9f8b0761fd310e76f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nipisod.ru/123?utm_term=blackmart+alpha+apk+apkpure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450041/normal_5fd1361a7ecd3.pdfIn PDF document text
    • https://xujajogasugoni.weebly.com/uploads/1/3/4/5/134514057/lazaguja_fosim_nabesemexig_xugukinele.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455883/normal_5fc9b01b50a44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465259/normal_5fe02abe939a1.pdfIn PDF document text
    • https://musekakilex.weebly.com/uploads/1/3/1/4/131406804/eb5e8ea5d699e.pdfIn PDF document text
    • https://fubasuwa.weebly.com/uploads/1/3/4/6/134611144/nidomepedapima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_60105d2e63e6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444351/normal_5fca63602c6fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486548/normal_60bc23869bd66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_60372cd7797a1.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/01d2abd4a6ae9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408197/normal_6047d7b251392.pdfIn PDF document text
    • https://bazulezegit.weebly.com/uploads/1/3/4/3/134372971/woxelimedokowi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://funuvutidip.pbworks.com/f/95404083434.pdfIn PDF document text
    • http://jotoxipigi.pbworks.com/w/file/fetch/144449154/qual_o_melhor_livro_de_direito_tributrio.pdfIn PDF document text
    • http://polujare.pbworks.com/w/file/fetch/144925005/hexagonal_numbers_in_pascals_triangle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6835e754-aa78-4f37-bcca-6a7dbccf55a9/69930467623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/082ca3d7-293c-4b75-91a5-8c2e409dbeb8/lg_wm3470hva_parts_list.pdfIn PDF document text
    • http://rerikisozid.pbworks.com/w/file/fetch/144660882/how_much_money_can_you_make_owning_a_chick-fil-a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b7b9eea-5468-475f-912a-3c73ff6dbdfc/vizio_36_2.1_sound_bar_system_setup.pdfIn PDF document text
    • http://tazijebep.pbworks.com/w/file/fetch/144428631/marketing_segun_stanton_etzel_y_walker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa53bc8-4b4e-4aca-b777-64183f398ecb/modox.pdfIn PDF document text
    • http://sisagexal.pbworks.com/w/file/fetch/144597864/woxitakar.pdfIn PDF document text
    • http://popuwepux.pbworks.com/w/file/fetch/144589017/86434987592.pdfIn PDF document text
    • http://rijunepupuja.pbworks.com/f/greek_mythology_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/739e0735-88db-4737-8447-e6361e73dc65/zaseg.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CC 4728 bytes
SHA-256: 4041d061072499eec16a766a55790ebc6de9cd9d84e3cdc0ab9f85dd3fea854a
font_01_sfnt_off000110de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DE 11628 bytes
SHA-256: 0ea814e6cfcf45b3c28457cadc225d951221fbbdab7c13b9e828f41f327e6bd0
font_02_sfnt_off0001370f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1370F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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