Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7600c3db1ed590f…

MALICIOUS

PDF

78.0 KB Created: 2021-03-25 15:59:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9423d11fb6769b0aad162c1c0f146115 SHA-1: 5448dcbdab5734675e1fe5c2b71617b323531854 SHA-256: a7600c3db1ed590f93e8e8a964ae6e85ec99718300b859080dbd7e494d479b67
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://yafferge.ru/strik?utm_term=how+to+get+a+free+lawyer+consultation In PDF document text
    • http://xokebidukefu.getenjoyment.net/gojano.pdfIn PDF document text
    • https://cdn.sqhk.co/xavonepez/igejeiY/26259315625.pdfIn PDF document text
    • http://zopedefijewe.iblogger.org/25871954519.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/gfheAhi/39374065281.pdfIn PDF document text
    • http://nefozufovi.scienceontheweb.net/39792610339.pdfIn PDF document text
    • https://cdn.sqhk.co/forinabam/ifcifhf/space_jam_song_instrumental.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/jigglyX/41296721509.pdfIn PDF document text
    • http://wawesoja.sportsontheweb.net/96765100032.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/ponivotigegepub/bulapalo.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/jijiwomipetomibotefiv.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/didonidadupoz.pdfIn PDF document text
    • http://bavatesivo.myartsonline.com/functional_data_analysis_ramsay_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/365bfae3-44a3-4e72-9500-298dadee0558/tewagimoguzeseviper.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/dokanilabaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349ffa28-10e9-4432-bb5c-3df34118d300/83882851237.pdfIn PDF document text
    • http://fefijenaxub.rf.gd/26975501694.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/examples_of_executive_summary_for_business_report.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/how_to_prove_it_a_structured_approach_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/bharat_mata_images_photo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/866d0d76-7490-4ab3-9036-b7434f7827b8/ancient_greece_religion_and_culture.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_off0000f4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F0 5204 bytes
SHA-256: ceec406ca77f56c527c88127a31333fec709c8d47a5778d6c7579c9150aa8589
font_01_sfnt_off000106d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D6 10512 bytes
SHA-256: f2e92e7708176fd556d2b19bac1869ef1442f8987359cdcf5c040259b9bb210a

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