Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9f3621ea18fa85…

MALICIOUS

PDF

69.6 KB Created: 2020-12-17 14:49:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d531de477a6d291777a7d5772438f847 SHA-1: b70b135c7bae58c7f03350187bc30ea425b92c61 SHA-256: ce9f3621ea18fa8562b7af75c0efdd644eaf241465c25bb3fc1a0b8ddeceafd8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique commonly used in link farms to direct users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to lure users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/strik?utm_term=ps4+free+monthly+games+may+2019 PDF link annotation
    • https://volifutizur.weebly.com/uploads/1/3/4/6/134602954/viduzemuwipem.pdfIn PDF document text
    • https://kezodedekupamo.weebly.com/uploads/1/3/4/6/134605888/f3a853c.pdfIn PDF document text
    • https://nuzilemuf.weebly.com/uploads/1/3/4/4/134479477/9839106.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rugatu-rugot.pdfIn PDF document text
    • https://zevamomarage.weebly.com/uploads/1/3/4/6/134611313/a6ee4010182e5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4c172cd1e280355ecdbe2/t/5fcf92cb1a78ee5f016c9407/1607439051461/real_racing_3_hack_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54079ea4a794d5661c0f1/t/5fd160d1ce71ee580f9cbec1/1607557329465/64029670590.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcee31b7a66e04eaf34ed2/1606217267642/thermodynamics_enthalpy_of_reaction_and_hesss_law_conclusion.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/duxiz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5acadaffbf90a660b1fb2/t/5fcf3c7c10aae775716c88de/1607416956726/27414742533.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/bar_chart_questions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf63daa97599144eef58d1/1606378459559/wooden_on_leadership_audiobook.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4a9b645712565430cd0c/1606371996408/80178638464.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/14787889156.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_off0000d245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD245 5856 bytes
SHA-256: 4e28a4c3887a355f474e346542729f5cb1f5f983173b71f2ba3ffc63ff0ebe98
font_01_sfnt_off0000e618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE618 10344 bytes
SHA-256: 9a614ff22412c6102e6890aec2eb47b80535cf8e04a7f51d745c0e3a94f9a237

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