Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b6d44f00f13d10…

MALICIOUS

PDF

82.0 KB Created: 2021-05-04 22:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7ce55b8ba289087970fad98b0cfe497e SHA-1: 9ea44f40faadbd883fd6517bd3a51aff79269e52 SHA-256: 69b6d44f00f13d1038f4d8aede6dcce9417ec6b095b3e415b6dac4efe8dffe0b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=fluval+406+impeller+broken PDF link annotation
    • https://cdn.sqhk.co/jemitaso/cshejeG/xijekirutemapusumalagi.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/26017680286.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369782/normal_5fde60ba12d5d.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/computer_all_shortcut_keys_free_download.pdfIn PDF document text
    • http://vumejopiraxu.mywebcommunity.org/biogeography_fourth_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488137/normal_5fd62b1808905.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/xefosufenajofonugotokakor.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/oibjh7b/9919344918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452853/normal_600a13b4be4e6.pdfIn PDF document text
    • https://cdn.sqhk.co/peporewav/FmihihR/kowuwo.pdfIn PDF document text
    • http://sepozimog.scienceontheweb.net/16313202981.pdfIn PDF document text
    • http://lozomaneje.getenjoyment.net/sony_xplod_12_inch_subs_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/toxotunem/bicigjg/dewexidopipi.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/e979xhb/basketball_stars_unblocked_download.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
    • https://uploads.strikinglycdn.com/files/6748e491-f4f3-4577-8509-38fd5fa3dbc5/robert_sapolsky_stress_documentary.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/belajar_bahasa_inggris_file.pdfIn PDF document text
    • http://bixozebaxikapos.atwebpages.com/69308675354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3881ed4d-7da7-40e0-96b4-311e365b9319/ladazewivamakupijudepataf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc500d7-8867-4a83-ae0d-0c29e55f9834/vukupugosanesi.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/chimera_tool_setup.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_off0000f44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44D 5192 bytes
SHA-256: 55b5961750a48e0b7f90084f40003092b635f1f8a81d0c9154117823e558dcc3
font_01_sfnt_off000105c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C8 10804 bytes
SHA-256: 21c5b743bf670f187327e1d9b9877b0cf5abed975d521954d87424a3ad8a7d17
font_02_sfnt_off00012a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A92 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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