Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d67af6ba804913f…

MALICIOUS

PDF

91.4 KB Created: 2021-03-16 17:27:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: eebd99b11b760731abaaf70da338570e SHA-1: 143e05ed4d988d6a861be69e3a45fe8af5551f3d SHA-256: 0d67af6ba804913f7f337b5a4bca9b899db723ba380eecf2b2d05c9bd02377d2
126 Risk Score

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 0.9995

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://xajibur.ru/123?utm_term=canvas.+todataurl+application%252F+pdf%2529 PDF link annotation
    • https://cdn.sqhk.co/wugunifikezu/10kgf9E/download_game_hollywood_u_rising_star_mod_apk.pdfIn PDF document text
    • http://kemikavar.mypressonline.com/xiderofozukobakavom.pdfIn PDF document text
    • https://navolujute.weebly.com/uploads/1/3/1/4/131483334/sifokurepimibu-vajoxizozi-zijewubo.pdfIn PDF document text
    • https://cdn.sqhk.co/zimidenex/idjjjgK/red_bell_pepper_in_italian.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/jbggibA/european_war_2_games_xbox_one.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/4598248.pdfIn PDF document text
    • https://cdn.sqhk.co/zapuduve/oafSjfa/mofadozalavafopiximorivoj.pdfIn PDF document text
    • https://porilijure.weebly.com/uploads/1/3/1/6/131606314/fipufeke_kisalopunejat.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://s3.amazonaws.com/wujodibu/9876637665.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/invoice_template_for_mac_pages.pdfIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_3f626b8b468d463189546b93f5fb63c4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7523105c-d2ec-4db0-91b8-d0ca1c43d68a/how_to_use_a_wagner_steamer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ae75194-b298-4439-bfcf-83c667f4621c/lamafero.pdfIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/how_much_money_do_criminal_lawyers_make_uk.pdfIn PDF document text
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_9d4a12cb9a2b447d95df6d041f774cb8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da21e3c2-3136-4b16-8cae-4ece0126c546/fakigiz.pdfIn PDF document text
    • http://totuxivez.onlinewebshop.net/fybcom_mathematics_statistics_book.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
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF41 2868 bytes
SHA-256: 7093daf193bf764ecd6d40e55327df6743a1b49a5bfd306bc79855f269883db6
font_01_sfnt_off00010976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10976 5140 bytes
SHA-256: 623ae8e7fa4872fe1840ee4c6f6327bb1009d4e16b6ea011429319d50c2f7e7c
font_02_sfnt_off00011ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD4 2836 bytes
SHA-256: b9cec3876610a00a906ae1babeddb4b1341a0cf46e547476e66e02b9144e8d6e
font_03_sfnt_off00012547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12547 12476 bytes
SHA-256: 13320333c3dacdc29f0c0ebaf801c7ffe8308ea54a332addb3247ac570d1e26f
font_04_sfnt_off00014fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378