Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be249e9c6eeea93…

MALICIOUS

PDF

114.7 KB Created: 2021-03-13 18:28:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f6d4c040e91ee7ec5158b5499b161d44 SHA-1: 2176ccd2170f8aaef566c3b17cbff2f963bc2e88 SHA-256: 8be249e9c6eeea9333e8f2c250bd521d8797a5ad9886cafaac24f371c0d0e865
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 0.9975

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://bologen.ru/strik?utm_term=what+did+the+end+of+pax+romana+mean+for+the+empire PDF link annotation
    • http://mazers.fun/tipo_de_sistema_operativo_windows_xp459ui.pdfIn PDF document text
    • https://nironaguvotu.weebly.com/uploads/1/3/4/5/134530025/nofedexiku.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/ciVqtHp/lumomonabisizizew.pdfIn PDF document text
    • http://stebsmeh.space/c_oops_interview_questions_for_3_years_experienceewoqd.pdfIn PDF document text
    • http://prostosite.site/vakizawuxolegodup98948.pdfIn PDF document text
    • http://optalpha.com/99395382229mpe53.pdfIn PDF document text
    • http://kernig.online/game_of_thrones_clash_of_kings_ebook_free_downloadeqkro.pdfIn PDF document text
    • http://idealica-official-it.website/bearcat_880_reviewd1ajm.pdfIn PDF document text
    • http://varistop.site/german_english_dictionary_of_idiomshs8jt.pdfIn PDF document text
    • https://detosujedeke.weebly.com/uploads/1/3/4/3/134371576/4618506.pdfIn PDF document text
    • http://getveran.site/theme_of_the_rocking_horse_winner_sparknotesgabqp.pdfIn PDF document text
    • https://sapuzexa.weebly.com/uploads/1/3/5/3/135348006/pirafolugadove_wibipezexinovan.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/himOuif/funny_guy_halloween_costumes_diy.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/5078991.pdfIn PDF document text
    • http://smartcoin.design/equifax_credit_report_address_and_phone_numbervqqo3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/47f3451f-90a8-4b70-9998-5d50168be1f6/how_to_change_time_on_casio_illuminator_wr100m.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93eae90-604a-4ae8-976c-ceead91e8958/sony_dav-tz145_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83427124-1488-4fec-a6c4-22f98323e4a4/begawerojuvubomixozerib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a3f83a-06e2-4483-81b9-f5192cdaa418/brain_teasers_for_middle_school_students.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/free_cognitive_test_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1996621d-0852-4077-a5c4-ee3e1ca019a2/96309982325.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/pugojubudejo.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/risk_management_policy_template_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/bejepazizoma.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000176e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176E4 4940 bytes
SHA-256: 9eef65a1afbf148047579a36e3498c5a04ddac676b41041ad73434507b19e7c3
font_01_sfnt_off0001878b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1878B 10812 bytes
SHA-256: 33122fc80bf730a07db2c4506370b27b4b84ba96a25ff4fbf3bd894bdcf9c224
font_02_sfnt_off0001ac39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC39 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361