Malicious PDF — malware analysis report

Static analysis result for SHA-256 7890c5aba0c6f42a…

MALICIOUS

PDF

71.7 KB Created: 2021-02-20 21:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: be8a84864c096694c83a399b5bd644bf SHA-1: e79859101441998ce23df564255548e9edd93586 SHA-256: 7890c5aba0c6f42a9358d5a9211e86755a2cc82ce22d36873cf2622b3ba6b876
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of an external URI heuristic further supports the attempt to redirect the user to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=three+positive+effects+of+volcanic+eruptions PDF link annotation
    • https://cdn.sqhk.co/sapamine/eIjchiV/labebevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_5fd7e9d3cde1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379384/normal_5ff65a0f5e173.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/hi7ifib/tigixitabefo.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/iiivPoR/your_nails_done_while_pregnant.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/kyibifD/mavaduseritejegaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_60218b725c219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450156/normal_600ed9fa84099.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463824/normal_5fdf9d9b9c5a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483089/normal_600cdf51a5c04.pdfIn PDF document text
    • https://cdn.sqhk.co/buruvalufe/hjBNgWC/download_citra_3ds_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/gjibjaj/32485349175.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/feseni/armorsmith_lvl_guide_gw2.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/chuunibyou_take_on_me_eng_sub.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/42511110306.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_off0000dc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9D 5112 bytes
SHA-256: 8b5e4f7d0618cc495fceff4fbcf93e27cd77520a0808f86c02ca6c8a2b74abe0
font_01_sfnt_off0000ee06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 10504 bytes
SHA-256: 4cf08b454b3010ecc2dab7de5126c643d4b3480c56513c6f961f3f66520b1178