Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5e8e6847211c3b…

MALICIOUS

PDF

98.1 KB Created: 2021-02-15 21:52:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5bff3af04377a299431c70c6dc37f7b1 SHA-1: 562feb32c445588b37c83785d2e4cd0455378f85 SHA-256: 6d5e8e6847211c3bf7c8878574e80599fa32ca04b205f476f6004cbda7a8c794
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The presence of a link to 'jottigo.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or redirection to 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://jottigo.ru/strik?utm_term=willy+wonka+and+the+chocolate+factory+cast+wiki PDF link annotation
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/c674c6a669.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/T2sjfhc/outdoor_gravity_ball_pigeon_forge.pdfIn PDF document text
    • https://woxamaxepid.weebly.com/uploads/1/3/0/7/130776503/7410535.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/hat7hdb/6631462657.pdfIn PDF document text
    • https://jarowezib.weebly.com/uploads/1/3/0/8/130813985/9335f.pdfIn PDF document text
    • https://cdn.sqhk.co/vosiwuli/Wf7jeQQ/defence_application_process.pdfIn PDF document text
    • https://tatonipek.weebly.com/uploads/1/3/4/8/134874136/pefukabopufop_dasukugowiju_legew.pdfIn PDF document text
    • https://garixapevawena.weebly.com/uploads/1/3/4/4/134495328/5119170.pdfIn PDF document text
    • https://mumerigowijegap.weebly.com/uploads/1/3/4/7/134771458/suxoluteza.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/c2dedddee.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/dugibabafod/betway_poker_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/90320910011.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/21420385211.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/financial_reporting_council_corporate_governance_code_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/gilosikebukamedit.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/11067574019.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/ro_dbt_worksheets.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_off0001411e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1411E 5380 bytes
SHA-256: 457a4312a99e0e6deef14de4712cda60e02adcef5657e479b493ff8a9549a628
font_01_sfnt_off00015386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15386 11584 bytes
SHA-256: c305ad5b5d94556cc6d4f5d363a8d1dcdabba2e8b6b8b5c028a6fe3f784ee07f

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