Malicious PDF — malware analysis report

Static analysis result for SHA-256 b19f946e33266c6e…

MALICIOUS

PDF

76.8 KB Created: 2020-11-18 06:09:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9dcb524e85741b674b6f5c9acdd9af55 SHA-1: 4ae27bc030591f2dfd7852d0a49bdc0bb990ed46 SHA-256: b19f946e33266c6eaf4b96988d954fdc45d331a1972d269790e61d76a8ee1db8
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized, suggesting an attempt to manipulate search engine results and drive traffic. One of the extracted URLs, 'https://traffnew.ru/123?utm_term=descargar+spotify+beta+premium+apk', is identified as a phishing URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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/123?utm_term=descargar+spotify+beta+premium+apk PDF link annotation
    • https://wuxepufoz.weebly.com/uploads/1/3/4/3/134371519/b1653837ec15c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5fa52cb107818.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/dazemi/refurbished_65_inch_4k_smart_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/appareil_genital_feminin_et_masculin.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/carillas_de_resina_indirectas.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/zutirebogi.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/manual_muscle_testing_scores.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/clash_of_clans_new_update_19.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/esge_guidelines_gallstones.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD0 5608 bytes
SHA-256: 2be3aa444918791e11312411d6e12f82571df1a0da68fd73ae08925d1d4bcb3b
font_01_sfnt_off0000dfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE2 3128 bytes
SHA-256: 76ed6d1cc81ae6102ba55089981d4658c8dc5b07cd003fd0abeaba145e5df745
font_02_sfnt_off0000ec35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC35 10756 bytes
SHA-256: 532a017aea20d22b59d0af83062b570a02da2fedb6304d301d8f70864b06b5f4
font_03_sfnt_off000110f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F2 16080 bytes
SHA-256: b118ad4a5f0f66e944d0a6e82a0dad6050c27e77cb1eabf64d07f40874ae21b7

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