Malicious PDF — malware analysis report

Static analysis result for SHA-256 684ebecbf77ae1f9…

MALICIOUS

PDF

80.4 KB Created: 2021-03-23 16:00:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8c46edcdb476b71e7ad55bc310948363 SHA-1: 3645bff554c595f9ff7c16aa84469a6782c7ec95 SHA-256: 684ebecbf77ae1f9d6897866969200e01ae2ba76896113b6ae54b544cf8f3cdc
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to a PDF file on s3.amazonaws.com, suggests a link farm or distribution mechanism. ClamAV detection further supports its malicious classification as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://fokemale.ru/123?utm_term=odia+album+dj+song++2017 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413475/normal_6026d5ade3684.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/whirlpool_cabrio_repair_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406809/normal_603fd5618191a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482027/normal_600fac93554c0.pdfIn PDF document text
    • http://medilawibume.scienceontheweb.net/are_combination_washer_dryers_good.pdfIn PDF document text
    • http://dibiwarisogix.mygamesonline.org/cours_automatique_bts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385004/normal_600859c9a6fe5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fizaxo/89539467411.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/94237088691.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/22423300626.pdfIn PDF document text
    • http://sopudekazulute.rf.gd/facebook_poll_more_than_2_answers.pdfIn PDF document text
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_11c1ad079161492c981930bf22e85ff3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/insect_glaive_guide_monster_hunter_world.pdfIn PDF document text
    • http://pulawev.epizy.com/microsoft_word_award_template.pdfIn PDF document text
    • http://ziwebizivag.epizy.com/safety_data_sheet_example_us.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/how_to_use_brita_bottle_filter.pdfIn PDF document text
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_290b8ce048214dd3a417464403524327.pdf?index=trueIn PDF document text
    • http://jerokiguwipifo.rf.gd/what_can_you_eat_while_doing_the_daniel_fast.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_0c9d63e9badf47c887732f225df44264.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/xuvekegulavedikof.pdfIn PDF document text
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_47413c0886914a089666be68e16f6710.pdf?index=trueIn PDF document text
    • http://jadefixadejin.rf.gd/auditor_general_report_petrojam.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBE 5700 bytes
SHA-256: a233bf3a9f9ec973585281b170f80b44ce50e34c6a02605632d9fe67a39d4319
font_01_sfnt_off00011016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11016 10720 bytes
SHA-256: fe8f7f708f2931084324a791a6a40acc0a0b127c713cfc39b06083c8ef378730

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