Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4402ed2ed098d8…

MALICIOUS

PDF

77.1 KB Created: 2021-02-12 01:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c4861baaee17d7fcb5e61cbb5c3872c6 SHA-1: b87bd503f3b72f62cc1410911b0be211b49092d1 SHA-256: dc4402ed2ed098d8949be1fbdfb91fc16313ad7e01a2ea4246e50764f4e030ad
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous external URIs, with a critical heuristic identifying it as a link farm. The primary malicious URL identified is https://maypoin.ru/wix?keyword=maroa+forsyth+grade+school, which is likely used to direct users to further malicious content or phishing pages.

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=maroa+forsyth+grade+school PDF link annotation
    • https://xuvunigito.weebly.com/uploads/1/3/1/1/131164310/f13dd72126.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374700/normal_600245f428f03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366395/normal_5fec34f18ae4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451374/normal_5ff91faa11014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426425/normal_6018d64abe673.pdfIn PDF document text
    • https://jateredadiwez.weebly.com/uploads/1/3/1/6/131606262/dafusufotajikig.pdfIn PDF document text
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/c1c13b0adbd9c.pdfIn PDF document text
    • https://bulasenojagaroj.weebly.com/uploads/1/3/4/3/134357248/132547.pdfIn PDF document text
    • http://hdvideo.design/template_for_expenses_and_incomelqncn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_600a0d9cdbaea.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/7477131.pdfIn PDF document text
    • http://pedrons.space/microreactors_in_organic_chemistry_and_catalysisrpsnq.pdfIn PDF document text
    • https://nogomikosisodop.weebly.com/uploads/1/3/2/6/132681488/sewedotobobakejozo.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/kiremefegonar/negixadigegeruzi.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/kokot.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/ben_10_omniverse_2_apk_data.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/15674185095.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/bivisasena.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/amazon_appstore_apk_ios.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_off0000f20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20A 5392 bytes
SHA-256: 2ecf34ad93e40b46e9347f805bc4de613fabdb86daeef7dd60261d90e2e9e0d3
font_01_sfnt_off00010476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10476 10328 bytes
SHA-256: 431f3d523153b7337f1092818dd9f48a845ec27b9cf0bd5457633d4241273ec5

Open this report in the interactive analyzer, or submit your own file for analysis.