Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a2f9f4832120b2…

MALICIOUS

PDF

78.3 KB Created: 2021-05-06 17:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a38e801ccb9a040f892e097cb0986dc4 SHA-1: b25ff39e975c7b73d729b2aea3dc7e3bc51c4a7b SHA-256: 86a2f9f4832120b2fb61002d46412b12fc66f5173940a76572a83337a492a89c
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9998

Heuristics 4

  • 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://bologen.ru/strik?utm_term=the+maze+runner+2014+dual+audio+hindi+720p+bluray+free+download PDF link annotation
    • https://polokoxukoneg.weebly.com/uploads/1/3/2/8/132816042/vufokodifelikoporub.pdfIn PDF document text
    • https://vilabusifa.weebly.com/uploads/1/3/0/7/130776169/zitadurozasanerirori.pdfIn PDF document text
    • http://vadozawemowo.iblogger.org/27924965378.pdfIn PDF document text
    • http://rugavup.iblogger.org/vebodakuvefoketivok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://retinizani.epizy.com/cambodia_daily_news_in_english.pdfIn PDF document text
    • http://nedifig.epizy.com/xawop.pdfIn PDF document text
    • http://nedelovuz.rf.gd/nagilorelikakisizajesodex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c5424b-fd77-464f-a7f1-4d545636d25f/zeminezub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe13bf80-9706-41f3-8ef4-659e8a474650/dell_optiplex_3010_motherboard_cpu_support.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/xafoxixuwivi.pdfIn PDF document text
    • http://pinogizege.rf.gd/54060317167.pdfIn PDF document text
    • http://musovulazapa.epizy.com/chase_crossword_clue_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/berberine_versus_metformin.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/music_streaming_platforms_in_india.pdfIn PDF document text
    • http://lurozakilaxa.rf.gd/job_interview_questions_and_answers_cheat_sheet.pdfIn PDF document text
    • http://gusufarafedi.epizy.com/83900890699.pdfIn PDF document text
    • http://xakodalomidu.rf.gd/caribbean_vegan_recipes.pdfIn PDF document text
    • http://lobobeges.epizy.com/nafatebidumonugax.pdfIn PDF document text
    • http://vukanaxugosazed.rf.gd/definition_of_analytical_chemistry.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_off0000ef59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 5928 bytes
SHA-256: 50c6b98c8a80e90017e7c3ea523a44bb0684cc4cde55afa13135d401c3766a93
font_01_sfnt_off00010382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10382 11680 bytes
SHA-256: 413323dea77358c7fda97bca1bf2ec1245f632b3ffbcaf6853f3055077e99cf6