Malicious PDF — malware analysis report

Static analysis result for SHA-256 9959abc6a9781d5b…

MALICIOUS

PDF

91.5 KB Created: 2021-03-20 18:50:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5a719551368507a51d8f05ec0a0f1feb SHA-1: ebbd7aa1ac1c194f89c171454f070771331fb515 SHA-256: 9959abc6a9781d5b58a289a5ade62f9804dfb3b2a7e717ee3caf24fe88195344
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 vilenefex.ru, suggests an attempt to redirect users to potentially harmful content or to engage in SEO manipulation. The ClamAV detection as Pdf.Phishing.Trojan further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=discussion+prompts+for+guided+reading PDF link annotation
    • https://sizigemud.weebly.com/uploads/1/3/4/6/134606095/kugenuparolawev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443812/normal_602dd96d7d815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384164/normal_5fd2420e7a2a5.pdfIn PDF document text
    • https://bolefusugo.weebly.com/uploads/1/3/4/8/134868203/ruxuwazizebomekukog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389585/normal_6012fa39b8640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428069/normal_60107f828ebab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448539/normal_60180f2587263.pdfIn PDF document text
    • https://kegipulavuraruz.weebly.com/uploads/1/3/1/1/131163865/xukaki_magekepu_vijeluv_bevowujiseta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383678/normal_602d83eaae4f6.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/jajuzasalikirut/rirotu.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/stephen_king_rita_hayworth_and_shawshank_redemption_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/is_the_movie_glass_part_of_a_trilogy.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/jemijamuvipuledeled.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/shareit_app_old_version_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/49176504392.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/komimiziwevumogujujedisek.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/infuriating_crossword_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/16225782230.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/ninasimezadavoxukokaza.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/complete_works_of_swami_vivekananda_vol_1.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_off00010787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10787 5440 bytes
SHA-256: ae8eb4cef934431011bbf2ded21ab1c777fc258580393db61bdf649ece07c391
font_01_sfnt_off000119f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F0 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0001227d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227D 10968 bytes
SHA-256: 95e7da275add1022e7571c7764d60bdd5b2fd314e90a1071265810b03a018027
font_03_sfnt_off00014815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14815 16596 bytes
SHA-256: 5914e0f3322fc5c025a9fa00dd8cd9c244907a23bc0b4081da326258f0e7cf7d

Open this report in the interactive analyzer, or submit your own file for analysis.