Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8a9ed8eff2ef7e…

MALICIOUS

PDF

75.8 KB Created: 2021-02-27 22:31:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 15348499bc91b4554dbd13c3a33a1813 SHA-1: ddc5bacf0e72822ff6ad4d50274022c00ed20b56 SHA-256: 1a8a9ed8eff2ef7edca520cf2bacc2acd8915200f8e6e65c983604b51e1b6ff8
112 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains heuristics indicating it's a fake invoice or payment lure, and presents a call-to-action. The embedded URL `https://xajibur.ru/123?utm_term=does+a+bill+of+sale+have+to+be+notarized+in+mississippi` is the primary indicator of a potential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/123?utm_term=does+a+bill+of+sale+have+to+be+notarized+in+mississippi PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494891/normal_5feea050f41c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450350/normal_5fef169c6867e.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/how_to_program_siemens_plc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_6036a5c5f0501.pdfIn PDF document text
    • http://jotewelife.iblogger.org/89791030630.pdfIn PDF document text
    • http://pokavitapizinuv.iblogger.org/10649565204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446285/normal_5fe43b0fa22d2.pdfIn PDF document text
    • https://fubapisa.weebly.com/uploads/1/3/1/4/131406294/70803fa71.pdfIn PDF document text
    • https://pexafibilo.weebly.com/uploads/1/3/4/4/134484824/fokurojitopaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407724/normal_602a026868efd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404738/normal_5fcc8a891d5a2.pdfIn PDF document text
    • https://guduzuzej.weebly.com/uploads/1/3/1/6/131606672/sakog_sodeditibabepad_lufifi_kupafafi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fobonerenajob.epizy.com/chopper_2000_movie.pdfIn PDF document text
    • http://vamivesuger.epizy.com/introduce_new_staff_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/calendario_settimane_2019.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/11110899244.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/wijipusiserukuzifimed.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_off0000ec7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7D 5532 bytes
SHA-256: d62993296e6b356fd2bc8aa257e3478efa0bd8c3adf77eb86e6e8ed681943595
font_01_sfnt_off0000ff32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF32 10112 bytes
SHA-256: abb732b8becdceb67b56759f816e73d0f66aa404cdfa7b2caae6ea31ed675889

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