Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b04462370c78239…

MALICIOUS

PDF

73.6 KB Created: 2021-02-17 20:39:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 43420cf727ba68357a74343c2ac0c8a5 SHA-1: f0760d4d31d5cfe77806e2601d44a53a02c90651 SHA-256: 8b04462370c78239fedd3076164898cd45be894ba449ff41c438a774a8d4ce89
156 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics as malicious, including a critical detection for a 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of numerous external URLs points towards a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/123?utm_term=swann+camera+power+supply PDF link annotation
    • https://dowebirajosem.weebly.com/uploads/1/3/6/0/136010559/72b412.pdfIn PDF document text
    • http://4d-5d.com/descargar_gta_vice_city_gratisccerq.pdfIn PDF document text
    • http://study-english-04.space/adobe_illustrator_android_modjska5.pdfIn PDF document text
    • http://abreudesigns.com/rudut63zld.pdfIn PDF document text
    • http://demask.fun/servicenow_admin_certification_dumps3puwd.pdfIn PDF document text
    • http://1-bog.ru/abcd_songs_tamilez3kg.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/gikagefekegerad.pdfIn PDF document text
    • http://idealicaitalia.website/itunes_for_macos_catalina_10._15fcmf6.pdfIn PDF document text
    • http://tevfikyuce.xyz/61098302231m8fkj.pdfIn PDF document text
    • https://piwetidij.weebly.com/uploads/1/3/2/3/132303123/lavimiw-lidipokazurokuk-xopam-vetusuwu.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/takexoxdcg4o.pdfIn PDF document text
    • https://cdn.sqhk.co/xutujipux/hgHhiia/69316709878.pdfIn PDF document text
    • http://triple-doska6.club/bv_doshi_philosophyh2fnv.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/gfoiiq5/vaxavopikalefusigerabe.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/ggFpqgg/jolasoxuko.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/SHzhjbG/dekeralevusimuvur.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/zuguvoxoki/lakinejizofeseseruja.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/devexpress_report_designer_angular.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/numpy_docstring_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/buy_acetate_sheets_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/algebra_nation_section_2_topic_3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/xorakafuderim.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/me_before_you_soundtrack_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BF 5132 bytes
SHA-256: 4fe524c31ae613a3663520e9f48b64dc631e7e325d1da923c3401da552bfcc08
font_01_sfnt_off0000e517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE517 11576 bytes
SHA-256: 59e83c89320dd20a3d1ad6492edde434abe65cfc408810bd697f58cb2ebaec02
font_02_sfnt_off00010ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACE 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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