Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbcface25ff325d…

MALICIOUS

PDF

67.9 KB Created: 2021-02-14 07:26:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dbd44d22feca598ff8b15b4541dfda0f SHA-1: f4079b9ce67b009497149c20f8ab6e0cdd5cd317 SHA-256: 9fbcface25ff325d6ab95baa188dd079763d7774e5507305870cfd2e1c80c6f0
164 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' and an ML classifier gave a high confidence score. The document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or a method to distribute further malicious content. The presence of a download lure further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=yo+movies+apk+download PDF link annotation
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/kuwuzat.pdfIn PDF document text
    • https://derigogo.weebly.com/uploads/1/3/4/0/134017063/ribesaxedimalodulif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_601aacb63cb4c.pdfIn PDF document text
    • http://my-favshoph.online/61697179504d6jqh.pdfIn PDF document text
    • https://tabureribe.weebly.com/uploads/1/3/0/8/130813037/nonege.pdfIn PDF document text
    • https://kipusisuvosa.weebly.com/uploads/1/3/1/4/131406826/zagukeratow.pdfIn PDF document text
    • http://usmileofficial.site/metobopudumenumche25.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/qWGiiij/fancade_tumble_level_40.pdfIn PDF document text
    • http://organicsss.space/large_cookie_sheet_linersjka77.pdfIn PDF document text
    • http://it50disconto.info/apiic_full_form_in_telugu_meaning22so8.pdfIn PDF document text
    • http://myluckybet.xyz/organic_chemistry_questions_answerslear7.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/tabobujimo/mandatory_sentencing_guidelines_were_created_to.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/luxujurosu.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/sedikonewigudipawi.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/up_btc_form_2019_notification.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/76703733040.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_off0000ce6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6A 5184 bytes
SHA-256: 575b97faf627181ffcdb6e093a07a6036ba490b5280d67a2b94fa75d3fd93786
font_01_sfnt_off0000e013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE013 10128 bytes
SHA-256: d255ee2d34f6376c5b25f2dabec08d224dfa174db4285f23f7c605b1cc0c8545

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