Malicious PDF — malware analysis report

Static analysis result for SHA-256 452a21d1314a63bd…

MALICIOUS

PDF

76.9 KB Created: 2021-01-19 20:53:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9523f17236b7f883d78de39d011eed03 SHA-1: eecc9e73cc16531fc68ef68e160f75302e9f774d SHA-256: 452a21d1314a63bdfc0f4aa1fab61e1fcedd470719d25d80ba80be67e1e26d70
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and the ML_NYX_PDF_MALICIOUS classification. The ClamAV detection further confirms its malicious nature. The primary attack vector is likely spearphishing, with the PDF acting as an attachment designed to lure the user to a compromised website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/123?utm_term=thomas+kelly+high+school+shooting In PDF document text
    • https://sumajodezidozi.weebly.com/uploads/1/3/3/9/133997227/4fcf8.pdfIn PDF document text
    • https://site-1177836.mozfiles.com/files/1177836/apa_alphanumeric_outline_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405440/normal_5f9502b5d5840.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366358/normal_5fc8f395467bd.pdfIn PDF document text
    • https://rigawegafo.weebly.com/uploads/1/3/4/5/134587157/0f28e6075.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/fabidezele.pdfIn PDF document text
    • https://site-1166749.mozfiles.com/files/1166749/66194700887.pdfIn PDF document text
    • http://laxelenokuro.22web.org/lagu_adit_sopo_jarwo_terbaru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5fbb2bdc6e63e.pdfIn PDF document text
    • https://site-1167933.mozfiles.com/files/1167933/photo_gallery_bootstrap_template_free.pdfIn PDF document text
    • https://pamemigewoguvo.weebly.com/uploads/1/3/4/4/134438925/1f371.pdfIn PDF document text
    • https://site-1178139.mozfiles.com/files/1178139/world_cup_match_heroes_live_video.pdfIn PDF document text
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/7007b2a05a9f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rojapaj.epizy.com/4095131746.pdfIn PDF document text
    • http://fokodema.epizy.com/accredo_prior_authorization_form_for_botox.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/gorobilidifukepewori.pdfIn PDF document text
    • http://fapubogodomeduj.epizy.com/fundsmith_equity_fund_sicav_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/daggerhood_achievement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/chaitrada_premanjali_kannada_movie_song_free.pdfIn PDF document text
    • http://pupudewasoxo.epizy.com/mujupuwinife.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/confusing_riddles_with_answers_in_english.pdfIn PDF document text
    • http://peworesafasar.epizy.com/22006844998.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_off0000f088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF088 5232 bytes
SHA-256: 9ab2b6a0b341497628b36849169d963378c2601a66ac983429040fefd3256984
font_01_sfnt_off00010240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10240 10572 bytes
SHA-256: c6e97b4ba65730c755be4c5f760d4832587c332108de14bb777d2543141645fd

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