Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a62a7e215c68db…

MALICIOUS

PDF

82.7 KB Created: 2021-01-25 21:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f05ad1cd9261ea986012f4e6d5004fbc SHA-1: ab3704164317d8cbe5d75e6191820a96643fc6b0 SHA-256: 63a62a7e215c68db78c076fbaf954f019084be3249bcf610294730458f7c2719
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-themed, suggesting an attempt to drive traffic to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and heuristic firings point towards a phishing lure designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffnew.ru/wb?keyword=best%20small%20cordless%20vacuum%20cleaner%20for%20car PDF link annotation
    • https://cdn.sqhk.co/sadirorig/iidieje/lezojekuros.pdfIn PDF document text
    • http://femokotafi.66ghz.com/64648845970.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/igAjeQz/fofefavokozegatekaxak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501991/normal_5fd5fcc564579.pdfIn PDF document text
    • https://cdn.sqhk.co/pedajobu/chfhjRL/visuzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458428/normal_5fd696ab1ac7a.pdfIn PDF document text
    • https://vusozegaxu.weebly.com/uploads/1/3/0/8/130874635/rupinul_gikevisuw_wegigidapusu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fed32cfca02a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471096/normal_5feb29fd838dc.pdfIn PDF document text
    • https://cdn.sqhk.co/sirojenu/5dvfTpe/dia_de_victoria_radio_bogota.pdfIn PDF document text
    • https://cdn.sqhk.co/jagugide/jeZchiJ/adventure_academy_cancel.pdfIn PDF document text
    • https://cdn.sqhk.co/wunasesev/XyiX7QX/queen_web_series_ringtone_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424630/normal_5fe6adc6d9de2.pdfIn PDF document text
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/pamakazutov-siwex-folezamad.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/widiku/math_aids_place_value_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/django_templatedoesnotexist_source_does_not_exist.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/lixapaxerofuveponirole.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/aleks_business_math_answers.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_off00010689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10689 5276 bytes
SHA-256: c4dceb5b7064d9ea048e213f5cc00064ef159edca0949f0302f370435c24e0a0
font_01_sfnt_off00011869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11869 10792 bytes
SHA-256: 550bfdc03890e3cf7ca924a8067751c793c87d9fbf92c1b4e66b533e1262d898

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