Malicious PDF — malware analysis report

Static analysis result for SHA-256 023528354596cd04…

MALICIOUS

PDF

95.8 KB Created: 2021-03-18 08:07:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0163962657dc4cc897ff4c21efcccc2b SHA-1: 4143258b14666590719cd9953ddf40bb1b1c9f58 SHA-256: 023528354596cd0434ff352b2afb1d23b55a2837a8734e36947c8eeccb75a570
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to S3 buckets and other domains, indicative of a link farm or SEO manipulation tactic. The presence of a PDF_SEO_LINK_FARM heuristic firing and numerous embedded URLs supports this. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/123?utm_term=guide+pratique+de+l%2527+assistant+de+direction PDF link annotation
    • https://xifanelisiwokof.weebly.com/uploads/1/3/0/8/130874433/xejaluras.pdfIn PDF document text
    • https://ragidogatekanex.weebly.com/uploads/1/3/4/3/134388076/jujesawugekaxolaku.pdfIn PDF document text
    • http://minosijasif.mypressonline.com/lavizewuzoruvow.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/jomezodaxq0exg.pdfIn PDF document text
    • https://xizirujikalowev.weebly.com/uploads/1/3/1/4/131454807/ranomafuvasosujuv.pdfIn PDF document text
    • http://kieverts.xyz/free_dog_bandana_pattern_template8jqjz.pdfIn PDF document text
    • http://zeropium.com/pittsburgh_5_in_1_stud_finder_reviewsxgsuc.pdfIn PDF document text
    • https://wilulesutazi.weebly.com/uploads/1/3/3/9/133997377/3352931.pdfIn PDF document text
    • http://silkhfig.bid/vikakijawuxuly5vqp.pdfIn PDF document text
    • http://dmdmassage.com/how_to_reset_check_engine_light_nissan_sentra_20158x4lx.pdfIn PDF document text
    • https://gafepidata.weebly.com/uploads/1/3/0/7/130776025/buwaza_xufin_momimogaxi_fibafimibafubad.pdfIn PDF document text
    • http://jerugujekema.getenjoyment.net/ahmet_cevdet_paa_kitaplar.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/woxorojero/dias_festivos_de_marzo_en_estados_unidos.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/best_gba_emulator_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/voputupudifuzizoxif.pdfIn PDF document text
    • http://gixopiv.onlinewebshop.net/91932729648.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/scientific_journal_table_format.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/blackmagic_atem_mini_pc_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/midland_75-822_handheld_cb_radio_review.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/70825291648.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/countable_and_uncountable_nouns_exercises_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/zedidug.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/horton_hears_a_who_full_movie_in_hindi_dubbed_watch_online.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/breach_of_contract_complaint_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/how_do_i_get_my_hp_printer_back_online_windows_7.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_off000131fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FD 5256 bytes
SHA-256: 59012cba27f81d0334f845fa8832a04499467da1691512a497313dd5a1d20513
font_01_sfnt_off000143f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143F5 13648 bytes
SHA-256: ca7f2cc117ccd50f860bcec7442d97ea3c1e5d3475fcc192085abfd5b2f23559

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