Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0a63f6a3541d10…

MALICIOUS

PDF

70.5 KB Created: 2021-03-15 13:55:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07644087800f9ac432a91fe81b46fde9 SHA-1: 79654e7bebe71f46b827c057624b16c693d82026 SHA-256: 6c0a63f6a3541d105ee3f95fea24b667bfd81f4464e850801fbde5ad46966575
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking files, but one suspicious URL (resalured.ru) is present. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The PDF structure and embedded links suggest an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/wix?keyword=bc+rich+warlock+bass+case
    • https://cdn.sqhk.co/mibupufek/gejizgj/5261647766.pdf
    • https://cdn.sqhk.co/labifikup/hhfrIna/75965862862.pdf
    • https://cdn.sqhk.co/faxiwapa/Ikcijia/best_multiplayer_game_online_no_download.pdf
    • http://dajidefivujan.iblogger.org/books_like_cinder_novel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_966cc81ebd8c45b3bf8cc825909ba320.pdf?index=true
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_0579751b57a64d6b928ecff617c804d8.pdf?index=true
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_858c14e4653440fd8ac24fc6df70b47f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d5dac04d-c441-4c19-ad82-d12bf47c50ba/sony_rx10_iv_user_manual.pdf
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_9958edec6775434b93334303c9b1f62d.pdf?index=true
    • http://nijunopuk.rf.gd/waybill_dhl_form.pdf
    • https://uploads.strikinglycdn.com/files/d5347ae5-27ce-4374-b431-f29665f5ec84/engineering_drawing_basics.pdf
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_4571649e3a054a208ddee7900a43e59a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/37a54ca5-ea77-43b9-a117-f0cc3fafd460/forerunner_405cx_battery_replacement.pdf
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_488b69b7e43948f1b4be32b49dff63d7.pdf?index=true
    • https://19527f6f-7821-4b33-8e58-d909ab9a203f.filesusr.com/ugd/b18fc6_3327a8f1b9cf4f16b1e783057ac5dd97.pdf?index=true
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_cd56dec887b34b99b179f18573462962.pdf?index=true
    • http://jetubomubiko.epizy.com/sony_wh-1000xm2_tech_specs.pdf
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_56aa3156cfed4167a3b2fe91be5a7800.pdf?index=true
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_3559c9ec4dbb4802b0a2e12fae97e239.pdf?index=true
    • https://ae40ec61-d20a-40a8-9c94-208d4569f534.filesusr.com/ugd/5d0862_cc5a1069fc334b96815bddfb9ee3e51b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/aee70bd3-b512-482f-95bb-5f17f6781f10/the_boy_in_the_striped_pyjamas_youtube_full_movie.pdf
    • https://uploads.strikinglycdn.com/files/b649fdca-5fa0-4470-8bf8-421eb18b6aae/what_is_chase_bank_address_for_wire_transfer.pdf
    • 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_off0000d456.bin
bdfd6cbc734c6df1bf136ab3f9f831209080d03b84b1cbfa1da5fbcf8d1d9176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD456 5232 bytes
font_01_sfnt_off0000e630.bin
6608a1b8581920e52fcc9e7c39f09a79708caa6048919fdc1cf28cfcbe648101		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE630 10964 bytes

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