Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ca321cad4b421b…

MALICIOUS

PDF

81.6 KB Created: 2021-03-09 14:50:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e5a31c7de5ab7df6a8a57498efe604af SHA-1: 32f4e1a040839673fa3c353085e243059d3342aa SHA-256: f8ca321cad4b421ba73cd78eac378d1d17f0afd2c1acc06f19e018a61ed0bab0
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 0.9992

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://xezojetit.ru/wix?keyword=sos+brigade+armband PDF link annotation
    • https://pibefabetanob.weebly.com/uploads/1/3/4/3/134376782/0c7583.pdfIn PDF document text
    • https://cdn.sqhk.co/fufowomusixi/Vid3ibd/download_alien_zone_plus_unlimited_money.pdfIn PDF document text
    • http://presalle.xyz/22509853651uwte4.pdfIn PDF document text
    • http://idealica-it.website/salutupj0mfh.pdfIn PDF document text
    • http://blancer.xyz/minilunofowivinadivudojisqtpui.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376856/normal_6003652ddb22d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477626/normal_5ffe04f574a1c.pdfIn PDF document text
    • http://vsedlyatebya.xyz/56304916183llukg.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/lulemewus.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/white_space_graphic_design_definition.pdfIn PDF document text
    • https://biwoponafi.weebly.com/uploads/1/3/4/7/134767969/0475982cc4a45.pdfIn PDF document text
    • http://natorg.fun/adobe_premiere_pro_2020_download_size9ndwe.pdfIn PDF document text
    • http://kamini33.ru/how_to_reset_hp_8600_printer_to_factory_settings3oc2c.pdfIn PDF document text
    • http://arevakar-travel.com/shutterstock_photos_without_watermark3ywdm.pdfIn PDF document text
    • http://legendnat.space/dentalux_complexe_7_opinionsephct.pdfIn PDF document text
    • http://menformula.xyz/abdul_kalam_novels_in_hindi7td14.pdfIn PDF document text
    • https://cdn.sqhk.co/butofelo/aifHiak/escape_game_carnival_1.pdfIn PDF document text
    • https://jowozulabu.weebly.com/uploads/1/3/4/0/134013075/mawatok_kuxokaletomo_mufobalanoge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485443/normal_600a866de8d3e.pdfIn PDF document text
    • https://fukagopesuzidad.weebly.com/uploads/1/3/1/3/131381553/muvetesasez_fewifur_kukevuko.pdfIn PDF document text
    • http://khareedforosh.com/45537982644l9elt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/gazaw.pdfIn PDF document text
    • http://bavatesivo.myartsonline.com/quran_english_text_file.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_off0000ebc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC9 6972 bytes
SHA-256: 602b287b7f9f473d6aa67e09002c485ac7cc02a29e66d18103eaab7da2ff75a7
font_01_sfnt_off0001039a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039A 5356 bytes
SHA-256: b406e926078cca7a055a3cacbda49e9015aac1dd6bbd2d913b6d8ca8a786ee2e
font_02_sfnt_off000115b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B0 10216 bytes
SHA-256: 8db6486b67acd21f253b1436bf1a0d53f47e39274942192c388300274350a54a

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