Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac3093c6ff12279…

MALICIOUS

PDF

68.3 KB Created: 2020-11-09 17:49:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ff32f616f0b43801140d11059cbbed67 SHA-1: 2f6e5ab5ed7bce2b8f75e01ef06c0dca11e8e86b SHA-256: eac3093c6ff1227949eef2594cd30ff8f0aa0ac9949688c53a682f521d994359
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains numerous external links, forming a link farm designed to direct users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive external linking suggest an attempt to exploit vulnerabilities or redirect users to malicious content.

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://traffnew.ru/aws?keyword=matlab+examples+for+signals+and+systems PDF link annotation
    • https://wajatajosow.weebly.com/uploads/1/3/4/4/134487766/nomuta-kejigodepo-kirezakoxu-javuzobevupo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403118/normal_5fa8b65d4673b.pdfIn PDF document text
    • https://dewubonate.weebly.com/uploads/1/3/4/4/134466502/kidosijapi.pdfIn PDF document text
    • https://xudibonazo.weebly.com/uploads/1/3/4/3/134353284/a4ad9df09ea5.pdfIn PDF document text
    • https://jetijejage.weebly.com/uploads/1/3/4/3/134319548/4262738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424027/normal_5fa17624c8b2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387427/normal_5f8d8735082f4.pdfIn PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/01f58ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383678/normal_5f98d0471ad9e.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/xajowu/unidad_6_leccion_2_answers_avancemos_3.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/51510577038.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/solid_creator_9.1.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/chocolate_festival_2020_az.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AA 5676 bytes
SHA-256: d49b53fae20f45598110ada02eb19602d304a14e9665996eddd16d7c7201d3e3
font_01_sfnt_off0000dcf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF8 11380 bytes
SHA-256: cd229267de8672af04253093a691b774464ac99054576a43f504c9e8fe1752bf

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