Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4f06f8050d0b9d…

MALICIOUS

PDF

74.4 KB Created: 2021-03-06 00:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 856707c109f10909120efe8a185f4e4c SHA-1: d173d0a8ab64008a499f45bb5b2922b70d89019f SHA-256: ae4f06f8050d0b9dbbdf491d0cadfa852b34512b98fd3272d906ba4d1144bd6f
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically pointing to a search result lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document's structure and embedded links suggest it is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=what+are+the+steps+in+writing+a+chemical+equation PDF link annotation
    • http://dotekebenutedex.scienceontheweb.net/canon_eos_rebel_xti_400d_review.pdfIn PDF document text
    • http://wordsideget.top/683048289548jjk1.pdfIn PDF document text
    • http://storeeu.info/daffynition_decoder_5._3_worksheettqgty.pdfIn PDF document text
    • http://mamontov-net.cc/ge_avantapure_water_softenerxuvau.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://74b42eeb-3906-43e4-ace9-68a382952db2.filesusr.com/ugd/f9d4cd_a0b016848a44472982219f83fd21fda4.pdf?index=trueIn PDF document text
    • http://bolarerovu.epizy.com/18845649766.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/bakugatetivonifabe.pdfIn PDF document text
    • http://xigasew.epizy.com/daxofu.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/7880378986.pdfIn PDF document text
    • http://vopagaviximagu.rf.gd/8168659469.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/sadlier_oxford_algebra_1_practice_book_answers.pdfIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_3f45ab77269f4b38b80aa9cf5855f10b.pdf?index=trueIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_07c81c96f0f04ec7a1f785304d3ae0ff.pdf?index=trueIn PDF document text
    • http://putotapuzavip.rf.gd/cfg_to_chomsky_normal_form.pdfIn PDF document text
    • http://labomodofu.epizy.com/tegolaj.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/71713901426.pdfIn PDF document text
    • http://bitines.myartsonline.com/79049054290.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/97176411237.pdfIn PDF document text
    • http://pogapebod.rf.gd/formatos_de_cedulas_de_auditoria_en_excel.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_off0000e400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE400 5576 bytes
SHA-256: 1d3fdd2374bbf04f0f1471b639abd02b92127d3d002d4bc06f13f305996ff176
font_01_sfnt_off0000f6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EB 10860 bytes
SHA-256: 93e70247526eb10e4115b8b022e5ddad803bdfa20f8012f9a61c110b15c94746

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