Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce52461fabb06fb7…

MALICIOUS

PDF

98.7 KB Created: 2021-05-19 12:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9c0304ef72a8d9762ab30078446a0e5a SHA-1: e86d7d99d39c3da9f64c1fd8481e2ba56b1bf3f6 SHA-256: ce52461fabb06fb7c2220d6d4f434fc613d2b3ea545054970439aea1fca8c0db
156 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external links, with one pointing to 'https://jacksth.ru/strik', suggesting a phishing or malware distribution attempt. The PDF also contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites.

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://jacksth.ru/strik?utm_term=domus+line+midi+bk+manual PDF link annotation
    • https://sadijamozu.weebly.com/uploads/1/3/0/8/130814559/toguvutosirevo.pdfIn PDF document text
    • https://derigibi.weebly.com/uploads/1/3/4/4/134447264/rotawa-rujexes-sadovukalatapu-bagonam.pdfIn PDF document text
    • https://lapokatodulobak.weebly.com/uploads/1/3/5/3/135347459/paselegetefu-sozis-xikifoneza-suwobasujadoxe.pdfIn PDF document text
    • https://sogijanikufuruf.weebly.com/uploads/1/3/4/0/134042758/a48d6e87d7.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/5763200.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/gupawupigawono/marketing_information_system_easy_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/lion_heart_snsd_piano_sheet.pdfIn PDF document text
    • http://gozajogef.rf.gd/93174872864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c13b97b2-0838-41e5-98f5-5e56e6d19baf/anselms_ontological_argument_for_the_existence_of_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36235f9f-50d3-444d-8c09-b0c20b862eeb/what_is_chlorophyll_in_leaves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6923fc-bf96-4ddd-b89c-b2385253b265/did_the_snap_kill_thanos.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/95863135499.pdfIn PDF document text
    • http://fudojozijenabux.epizy.com/album_audio_songs_tamil_free.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/mawevetepopomazawosumutez.pdfIn PDF document text
    • http://votokigifa.epizy.com/learn_burmese_alphabet.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/89727046835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4685b7de-b800-444a-b45e-5e52a0c5df9c/stevens_320_12_gauge_tactical_stock.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001248b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248B 4880 bytes
SHA-256: 03a325fa34781e28e0cf83abdaef30a05643d040669a71f06fb67bd072d6d7f7
font_01_sfnt_off00013503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13503 11924 bytes
SHA-256: 87adadc216bd881e90c367fdff04ccd674f068103bc63829b1f8aca39669db9b
font_02_sfnt_off00015c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C0D 16060 bytes
SHA-256: 713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74
font_03_sfnt_off0001709f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1709F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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