Malicious PDF — malware analysis report

Static analysis result for SHA-256 9813ac6f6e7cbbbb…

MALICIOUS

PDF

76.2 KB Created: 2021-03-31 06:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e8b9d796f1d86908dccecefa3f34a1e7 SHA-1: 5a710bd7d7a4c71ceff0e51590ccfa383817a757 SHA-256: 9813ac6f6e7cbbbbb9cc9b72872468c633f4de2a6e69eb85404d6d33be37471f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/award?keyword=analgesic+and+antipyretic+pdf PDF link annotation
    • http://foxinawolukomat.iblogger.org/interior_design_proposal_template.pdfIn PDF document text
    • http://cozyplacefor.rest/world_iptv_free_online_tv_apke696a.pdfIn PDF document text
    • http://maxidadikegi.iblogger.org/endosymbiosis_worksheet_answers.pdfIn PDF document text
    • https://zupawifotifawe.weebly.com/uploads/1/3/4/4/134480263/812025.pdfIn PDF document text
    • http://50offshop.pro/file_manager_app_download_for_pcq4s6i.pdfIn PDF document text
    • http://mosasekoz.22web.org/72597871579.pdfIn PDF document text
    • https://mofutobanu.weebly.com/uploads/1/3/1/3/131383854/lafila.pdfIn PDF document text
    • https://zaximasuxudaris.weebly.com/uploads/1/3/4/5/134590642/8361938.pdfIn PDF document text
    • http://sanasesuj.iblogger.org/95974765946.pdfIn PDF document text
    • https://degunosusoteri.weebly.com/uploads/1/3/1/4/131453230/8933913.pdfIn PDF document text
    • https://paratokoke.weebly.com/uploads/1/3/0/7/130739311/rugik_gigop_niguzawit_tirele.pdfIn PDF document text
    • http://rakibanujixarep.iblogger.org/performance_appraisal_sample_wording.pdfIn PDF document text
    • https://senakubedezozi.weebly.com/uploads/1/3/1/6/131606366/467113.pdfIn PDF document text
    • https://mukekevujawova.weebly.com/uploads/1/3/0/9/130969498/tubuvefob_xigujizux_tataro.pdfIn PDF document text
    • https://belinadojo.weebly.com/uploads/1/3/1/6/131607131/ce6c19.pdfIn PDF document text
    • https://gisixumaxen.weebly.com/uploads/1/3/1/8/131856636/werero_nexovem_povemukok_pavowogivowa.pdfIn PDF document text
    • http://nebobewodog.iblogger.org/sitetukew.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/wewiro/57257645282.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/xusemijirisamejux.pdfIn PDF document text
    • http://meluromotav.rf.gd/azhage_azhage_album_song_full_hd.pdfIn PDF document text
    • http://zigazus.rf.gd/minna_no_nihongo_n5_renshuu_answers.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_off0000e907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE907 5416 bytes
SHA-256: afa52e49b3c07e320263ba0240c57141b704849126b19c2cf503e15f418b61bf
font_01_sfnt_off0000fb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8F 12508 bytes
SHA-256: 0916d2d652420f333f62e1abcbe2726acd8801fa505e3686138a1f0e90a0330b

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