Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9cf308ba71c7a4…

MALICIOUS

PDF

66.2 KB Created: 2021-02-23 09:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f788a82ccf81b14cc2c4f45837ab9c6e SHA-1: c0e86888f7bfd1f28a7c4bb71c4d907e38d45619 SHA-256: eb9cf308ba71c7a451b3485ab7dc1eeb6414e96774904bc3bff6996cf409166d
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with a primary URL pointing to a site offering a 'VPS free trial 30 day'. This suggests a phishing or scam attempt to lure users to a potentially malicious website. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or trojan activity.

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://maypoin.ru/wix?keyword=vps+free+trial+30+day PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459636/normal_5fc70dd9e6185.pdfIn PDF document text
    • https://dazenesulamese.weebly.com/uploads/1/3/1/1/131164173/retimekarokosa_zozulufojeba_junazobulolo_vuxavu.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/ggjihD4/flix_movie_theater_san_antonio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369764/normal_5fcc3738a05e0.pdfIn PDF document text
    • https://rokojilezel.weebly.com/uploads/1/3/2/3/132302907/7ef4c40.pdfIn PDF document text
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/42d99bfb62f60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_6016f05b621ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_6024c2338b32d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530429/normal_600eb069679aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409236/normal_5fed2259864d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373508/normal_5ff11c010db21.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/luborinizu/59410619087.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/27529243825.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/zirobikuzarex.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/fantastic_mr_fox_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/verschillende_bestanden_samenvoegen_in.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_off0000c672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC672 5408 bytes
SHA-256: 2b75eb49b7eb39ffce3b7af45e48c5539c554b6900ed00f0cdea2d34c9641d3a
font_01_sfnt_off0000d8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8ED 10420 bytes
SHA-256: b5d7ae80d4cbed2ad150f051d66b1c6258bff848682eee57677a4b41796c5570

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