Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f0fb7c1d7d9744…

MALICIOUS

PDF

101.6 KB Created: 2021-03-10 12:38:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9c44e9c1c52b93b90d807fc0b04bb3d SHA-1: 968f2efb83e1bd6f136af0ff4bbc2b0870df6b93 SHA-256: 67f0fb7c1d7d974427caa1280d08be1672f8921c8b5e046ce565ba8042e29f59
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain ('ponafet.ru') that is likely used for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a malicious intent to redirect users. ClamAV detection further confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/wix?keyword=digimon+cyber+sleuth+colosseum+guide
    • http://gayerkan.com/xutijekifitanerokajovopuhehv3.pdf
    • http://itanto.space/30589967764y3tdu.pdf
    • http://azorocheat6.xyz/libro_fsica_2o_bachillerato_mc_graw_hill8ksv8.pdf
    • http://pubgmobiie.com/index_worksheets_for_6th_gradeeqvsx.pdf
    • http://cocobuka3.xyz/how_do_contemporary_companies_use_public_relationsvltfb.pdf
    • http://eurofamily.pro/genius_scan_scanner_apk3eydo.pdf
    • http://realwockyc.info/the_wind_in_the_willows_movie_1995_streamingbf2g1.pdf
    • http://vbruti.site/65507483036zyv4g.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_27857938e5e441958820abab16ba65f2.pdf?index=true
    • https://39472683-7d43-4bc3-882b-0947a83fd973.filesusr.com/ugd/544c7e_c5604dac95bc4785980b95e2646b6521.pdf?index=true
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_611484ddc9394c399ea8cd78c8a6ded3.pdf?index=true
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_6efa3fb7dd3742a381983aebba3ca525.pdf?index=true
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_139a25927dcd4baabba72238979cf847.pdf?index=true
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_ce3b4b0b1d7c4e0d9a7324d1b7215649.pdf?index=true
    • https://598a1783-db1d-4ebb-96f5-d3ad23e1e090.filesusr.com/ugd/ae99eb_bed3d4c72b9243e78c7e66e110cda9f7.pdf?index=true
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_d636e235c8cb4b0f8a4c9dcddef2aba7.pdf?index=true
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_627ca1a1c54941528f9eb90232c8e220.pdf?index=true
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_271a42bebc94459bbee431aaef828085.pdf?index=true
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_2a00184d83da46058e756b090a896f02.pdf?index=true
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_d3d1aa432d794d0cb458f79c8dfbc387.pdf?index=true
    • http://gubadif.myartsonline.com/taboo_cards_printable.pdf
    • http://medazupu.onlinewebshop.net/bidopokojejuxumefixo.pdf
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_6c6b3b6ed9cd45f28c752573c4f0c175.pdf?index=true
    • 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_off00015261.bin
d322f98929d8f72d77d0b264b4047a9b0f71a21fc6006e7760d11ebe36a0ce57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15261 5384 bytes
font_01_sfnt_off00016490.bin
1d400e8c8c2bbf09a278166150207bcb1b5987b15213aa530b66d90e68766cbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16490 10688 bytes

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