Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8869dc3ce4b23e1…

MALICIOUS

PDF

78.7 KB Created: 2021-03-06 19:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8415080049a83f3aa4645be769989ae5 SHA-1: 11c4ca2d68d22bd1ef5226af057929cca5fffeb4 SHA-256: c8869dc3ce4b23e166b9a68e7f76b570e9a1aeee255c4918180e581000084515
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious or unknown domains, suggesting a link farm for SEO manipulation or malware distribution. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the PDF's structure indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://vilenefex.ru/wix?keyword=newton%2527s+law+of+universal+gravitation+worksheet+answers PDF link annotation
    • https://miruvogix.weebly.com/uploads/1/3/1/4/131408245/vulilapi_rebejazexujiw.pdfIn PDF document text
    • https://sapigufebo.weebly.com/uploads/1/3/4/5/134592603/2474d00ce0b0c5.pdfIn PDF document text
    • https://roxasunuveju.weebly.com/uploads/1/3/1/4/131437516/bajekixuxifobuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_6031781dcd76a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426830/normal_600a14dfac06f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450260/normal_60416617a7488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468530/normal_5fe736da46b91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470688/normal_603e8dd077067.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367271/normal_5fcd07ffac8dc.pdfIn PDF document text
    • https://xikaxuroloxo.weebly.com/uploads/1/3/1/4/131406092/rapijamiji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466370/normal_6012fb7878684.pdfIn PDF document text
    • https://kimetupuvojum.weebly.com/uploads/1/3/2/6/132680977/7c231841d6e13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424007/normal_5ff34e4f29e9b.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/baxunaf/autotune_pro_crack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/material_safety_data_sheet_ammunition.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/turisetuvexoxifezosazif.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/in_search_of_lost_time_online.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/julien_macdonald_dress_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/41153653948.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/twilight_breaking_dawn_part_2_full_movie_online_free_putlockers.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/gsheet_file_convert.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/bikaduv.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/cara_men_di_academia_tanpa_login.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/flirting_in_the_air_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/86811982027.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/jifamekisojimavovuzixezur.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_off0000f73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73A 5248 bytes
SHA-256: 8b117defaf1e3bdbbd8ebb8e4c7d12cd700cfe95a81c8a52b733f67066859d57
font_01_sfnt_off00010939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10939 10308 bytes
SHA-256: ea11cb9e960659ac8366b6d08bddbe1844a98b2f3ee99a15a49d9562301332f6

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