Malicious PDF — malware analysis report

Static analysis result for SHA-256 419fc09da6db75c1…

MALICIOUS

PDF

75.9 KB Created: 2021-01-14 23:29:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a55d65dfd094985b511c14c6b7c71db9 SHA-1: c29c8e46316c0d3b5f75740bf46c9c65f3cd810e SHA-256: 419fc09da6db75c1aec26e32738733f1456941c2927c4c7772405054239835b6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the link farm and the PDF structure suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://traffset.ru/aws?utm_term=capteur+de+vitesse+angulaire+pdf PDF link annotation
    • https://site-1176609.mozfiles.com/files/1176609/lamedipubajerugegefelifu.pdfIn PDF document text
    • https://site-1168272.mozfiles.com/files/1168272/first_strike_final_hour_apk_mediaf_re.pdfIn PDF document text
    • https://rofosuvobatijam.weebly.com/uploads/1/3/4/6/134661532/563cbda60.pdfIn PDF document text
    • https://site-1232793.mozfiles.com/files/1232793/75343785702.pdfIn PDF document text
    • https://revowerixes.weebly.com/uploads/1/3/1/6/131607662/9510595.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369310/normal_5ff272f868c84.pdfIn PDF document text
    • https://site-1171694.mozfiles.com/files/1171694/sloth_meaning_7_deadly_sins.pdfIn PDF document text
    • https://site-1168325.mozfiles.com/files/1168325/nafepevunemeweler.pdfIn PDF document text
    • https://doparobisupof.weebly.com/uploads/1/3/5/3/135329684/9479993.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/3cc39988c8b.pdfIn PDF document text
    • https://site-1174105.mozfiles.com/files/1174105/kanupunanexakuwuwovatife.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/zefurikaso-bagikefexowisuz-javeroletajov-jubeza.pdfIn PDF document text
    • https://site-1173482.mozfiles.com/files/1173482/kijagaladav.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/tizowodifi/canadian_solar_warranty_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/gasujesepewijazagol.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/grade_4_math_estimation_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/83731814261.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_off0000e7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AC 5176 bytes
SHA-256: c6044b3c3317aeb0fcd4434917b236cfbae4835217bd173618a00c12a6eaf8b7
font_01_sfnt_off0000f959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF959 12524 bytes
SHA-256: 6c38fc8e166ea781a3b7421687317874fc9e8c47b72fa6e1fb674c083d1f9a93

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