Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f908076350bd40…

MALICIOUS

PDF

79.6 KB Created: 2021-03-31 09:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 32271ce301fad9dc9fd93e86b02e833d SHA-1: 9dd2b33798dc0a526c172f713bd928f41fd62c83 SHA-256: 99f908076350bd40d81832d6121f0f34c46fb56e783465926187ac0cfeb8ce94
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://baarspo.ru/strik?utm_term=how+to+use+hose+on+bissell+powerforce+helix+turbo+rewind', is flagged as suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier further support its malicious nature, suggesting it's a phishing or trojanized PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/strik?utm_term=how+to+use+hose+on+bissell+powerforce+helix+turbo+rewind PDF link annotation
    • https://cdn.sqhk.co/varomapit/bDigibW/17522815780.pdfIn PDF document text
    • https://cdn.sqhk.co/nazujovo/I79hdhd/weight_room_circuit_training_exercises.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/437492.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/hfciiji/first_strike_valorant.pdfIn PDF document text
    • https://cdn.sqhk.co/sapamine/jggfAii/91808738453.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/hdBgeH9/56685994902.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/football_manager_handheld_2013_psp.pdfIn PDF document text
    • https://xaxarudo.weebly.com/uploads/1/3/0/7/130740130/db19b6e33f057.pdfIn PDF document text
    • http://ponemofetu.scienceontheweb.net/9229490516.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/timeziso/33098604899.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/high_school_transcript_template_for_homeschool.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/central_florida_east_coast_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/firepower_4100_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/ruvabixukiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/turbulence_fd_cinema_4d_r20.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/falub.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/symbolic_ai.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/alita_battle_angel_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/60612059264.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/doritexivirikibedujuw.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/anchorage_police_department_online_police_report.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/40214136620.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/crossfit_level_1_course_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/faxitidejelazaba.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_off0000f83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83C 5292 bytes
SHA-256: c86e5ec818ba00fc5801335d2cd0aae5515a92cb9057bd6ae2a3ff7bf2d650b8
font_01_sfnt_off00010a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A46 11200 bytes
SHA-256: 4c24d8516032fffc463a3ce8431f5b860b6b43b37c1e0ce5c0a87611c2e56431

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