Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ccd1048e13d9c4…

MALICIOUS

PDF

78.5 KB Created: 2021-03-02 02:57:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 13907c69ce27c066d33dee38d9552437 SHA-1: 605e5d622c580ab955e36c44cf25e6b4d5bfa7c3 SHA-256: 52ccd1048e13d9c46c2793a1047f287c710cf36fd3dcd6812bab5c82ee733f78
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristics indicate the presence of a large number of external links, including a link farm, suggesting an attempt to direct users to malicious sites. The embedded URL and the PDF link farm heuristic point towards a phishing or malware distribution scheme.

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://ponafet.ru/wix?keyword=bill+nye+storms+worksheet+key PDF link annotation
    • http://giocodigital.fun/pujaduwojajowegoxe5aj1b.pdfIn PDF document text
    • https://tupemewona.weebly.com/uploads/1/3/0/7/130775182/garobijefizonejido.pdfIn PDF document text
    • https://xajixaze.weebly.com/uploads/1/3/2/3/132302973/4793939.pdfIn PDF document text
    • https://gulurevipad.weebly.com/uploads/1/3/5/3/135349864/piligosu.pdfIn PDF document text
    • http://clebohets.xyz/15264898627hqb95.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/36343306068plgs4.pdfIn PDF document text
    • https://tuledekubixa.weebly.com/uploads/1/3/4/7/134722649/4503154514.pdfIn PDF document text
    • http://fdvsefwfrw.space/devusuzikamuczut3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nafoxuda/zoxowekodexinorulu.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/apa_research_paper_outline_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/dexorurepirobena.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/12500798766.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/microsoft_project_online_viewer_and_editor.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/wings_of_fire_the_dragonet_prophecy_audiobook.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e82c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82C 4812 bytes
SHA-256: 147a1f4f5ad0d9e426f282dcf947cc234d260a81fed00400e4f31c626946d748
font_01_sfnt_off0000f863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF863 10900 bytes
SHA-256: 49848fc18abc9f267536ca1c7e4fd4a5d64c04dce33b43dc7742ad31a238f30c
font_02_sfnt_off00011cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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