Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f39489d80cbaaf…

MALICIOUS

PDF

71.5 KB Created: 2020-11-10 13:45:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9dd244caa929c12086e00da0667231f9 SHA-1: bb7d53016e14e85a073dd9fc3f6d3519f5108fd5 SHA-256: 96f39489d80cbaaffcf0cabcced93aca9d20070a20dca8f7551963d49d7a4bb0
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 of which are SEO-optimized and point to potentially malicious content, as indicated by the PDF_SEO_LINK_FARM heuristic. One of the primary URLs, 'https://trafficel.ru/strik?keyword=dragon+ball+legends+apk+latest', suggests a lure for popular software downloads. The ClamAV detection and ML classifier further confirm the malicious nature of the document, likely serving as a dropper or phishing lure.

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://trafficel.ru/strik?keyword=dragon+ball+legends+apk+latest PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f87ba9894cb4.pdfIn PDF document text
    • https://wabewubo.weebly.com/uploads/1/3/4/6/134670528/zikugapub_petoxed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403418/normal_5f992c7da9a3c.pdfIn PDF document text
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/takirak.pdfIn PDF document text
    • https://gojupisot.weebly.com/uploads/1/3/4/0/134016698/pozapoti.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/lanorolowu/acgih_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/bronze_age_mindset_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/legend_basketball_unblocked_66.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/escape_to_blue_ridge_promo_code.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/2659807574.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/52425552629.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/sage_accounting_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/68829297478.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/procesador_i5_o_i7.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/approximation_questions_for_sbi_po_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/silat_jurus_forms.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE96 2952 bytes
SHA-256: 18f3dad90f0b8a749557125039a501166b605b51d41492c5c2dfd7e147c8bf53
font_01_sfnt_off0000d925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD925 5328 bytes
SHA-256: cd66ef257b23ad6a12fb7d74ab1c2885fc3c58553f9c0c0214556aed491aec13
font_02_sfnt_off0000eb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB55 10824 bytes
SHA-256: 434e79f50503b95775ca5465dcd6af915ad3ddc2b5c6056cafac5beff1675c2e

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