Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7071daa55ba94db…

MALICIOUS

PDF

104.5 KB Created: 2021-02-13 00:25:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 291333a41ca007f5ee91423d3f56bc0c SHA-1: 16df9bf49b0a63ab572013e9fc1ab7d0dbc1698c SHA-256: a7071daa55ba94db1e2742a8138c24dd7ea00eb7ac45122ca19d00b5b43b9ffc
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, characteristic of a link farm designed to manipulate search engine results. The primary URL, 'https://jottigo.ru/wb?keyword=le%20bouddhisme%20moderne%20pdf', suggests a lure to attract users searching for specific content. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan-like behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wb?keyword=le%20bouddhisme%20moderne%20pdf PDF link annotation
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/4701d.pdfIn PDF document text
    • http://zonixutazexe.iblogger.org/jewejaliboxuwumit.pdfIn PDF document text
    • http://natlab.ru/goodbye_yellow_brick_road_sheet_music_easygq7lu.pdfIn PDF document text
    • http://mestorating.ru/17026990516esll3.pdfIn PDF document text
    • https://tewukowil.weebly.com/uploads/1/3/2/7/132741555/suvati_kakaketarop_sifeguwir.pdfIn PDF document text
    • http://wazixusazajafem.22web.org/blood_relation_questions_with_solution.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/hbShifn/60983734945.pdfIn PDF document text
    • https://xubivotalo.weebly.com/uploads/1/3/0/7/130775972/65fb0584.pdfIn PDF document text
    • http://uber-global.com/pexidazukavopejewolmf1ur.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/dorulusof/normandie_ship_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/tecnologia_da_informao_logistica.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/template_kaos_polos_hitam_lengan_panjang.pdfIn PDF document text
    • http://wetusadesaxoni.rf.gd/96514191596.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/fusionner_plusieurs_foxit_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/avengers_infinity_war_wallpaper_4k.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/mapaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/55366449520.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_off0001577b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1577B 5120 bytes
SHA-256: e105faee11925d4a2ff3a91c9273afb770f9110536e37f408c632371db261625
font_01_sfnt_off000168b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168B6 14580 bytes
SHA-256: 56d2d16875f4b85dddef46843c4c68fe3970a89b04730c35dbb3eb2a19bed363

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