Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ac71f8a47b7ba2…

MALICIOUS

PDF

90.2 KB Created: 2021-05-02 18:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c1ce0f3867db05fcff26accc1db2010b SHA-1: 683cd6cb83318f4a22f59f341893189cc8250c5b SHA-256: 06ac71f8a47b7ba24ec25693bbebcb8670b38f687d2f8d96abe1b00f32cf972d
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 point to potentially malicious domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://midufefew.ru/strik?utm_term=biblia+interlineal+hebreo+espa%25C3%25B1ol+pdf PDF link annotation
    • https://cdn.sqhk.co/merabuvi/Cshchdd/lenovo_yoga_9i_availability.pdfIn PDF document text
    • http://itayoga.space/lg_air_conditioner_error_code_ch_07s3rb6.pdfIn PDF document text
    • http://sellforce.ru/end_of_module_assessment_task_5.1_answer_keye5js8.pdfIn PDF document text
    • http://remontvorot24.com/50228728216a8t6u.pdfIn PDF document text
    • https://zodimidaket.weebly.com/uploads/1/3/4/0/134096252/bufobidunigafe.pdfIn PDF document text
    • https://cdn.sqhk.co/sologavabo/gdhghdr/79889957547.pdfIn PDF document text
    • http://zdorovienashevse.xyz/lurozibexisuxa542zn.pdfIn PDF document text
    • https://jasebezaf.weebly.com/uploads/1/3/4/6/134630561/dawawibu.pdfIn PDF document text
    • https://sedezexe.weebly.com/uploads/1/3/4/3/134342112/f76dd02a5ca1d1.pdfIn PDF document text
    • https://xamelanaf.weebly.com/uploads/1/3/5/3/135331914/dezigav_nawarisuxi_vovexo.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/idqjbjh/my_dream_home_realty.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/zikeko/48968203943.pdfIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_fe9b0fbfe1814ebd8f431d87fbc047fc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/dibebejapitapesasowu.pdfIn PDF document text
    • https://f19d2187-ce67-4d04-8798-eef694565169.filesusr.com/ugd/bd4746_f69c1a6f060b45dd92665a32aa3bf874.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/32107231526.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/60983145286.pdfIn PDF document text
    • https://7605c768-a471-4169-85a9-0dab509fd250.filesusr.com/ugd/20ab23_7e6061544b504e8b910a13c7ee5b6c8f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/missing_411_cases_in_arkansas.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/jivagatejekonok.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/65761353938.pdfIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_772a3408d509443d9fcd1d012027e46f.pdf?index=trueIn PDF document text
    • https://ac614e2c-2e00-43e4-a80f-2c6bce9fb64b.filesusr.com/ugd/f103bb_5b7e5ed9c8cc4425b1b542ce64d77142.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xujitezu/homestead_act_of_1862_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/70360301076.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF232 2912 bytes
SHA-256: 379102226829f3bab3a3c763e92e857047a50d0750f2cd7a3c42e86eaecd7746
font_01_sfnt_off0000fc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC96 5532 bytes
SHA-256: edc84ebd1755909aa48ab4776f7c8ed6614b61befeef81917d88ad6affb2946b
font_02_sfnt_off00010f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F08 1796 bytes
SHA-256: 765b2ad1a38a94440f74f65db6bc516ebacd89c06915b0b5e704c447b4de4636
font_03_sfnt_off000117fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FA 13536 bytes
SHA-256: caab08bad11b494e7647acd5d5323fe64a8d43fd9545a813f48c90a10a6d7ae1
font_04_sfnt_off00014251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14251 16196 bytes
SHA-256: c0351e9a661e93b5b024187f5f22a3d8eef113da5d9b40302cc3ebd73b325851