Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cac48fabf15c2e6…

MALICIOUS

PDF

70.9 KB Created: 2021-02-07 12:27:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8dd28fdf958e05d996effb73ebab59ea SHA-1: 90eb8428ca0eca09acad7ebe4467049213940e44 SHA-256: 1cac48fabf15c2e662c0acde03fac41ecd370cfe306753e547b85888e62fe097
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://druttle.ru/wb?keyword=lol%20janna%20build%20guide', which is likely used to redirect the user to a phishing site or download a secondary payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs strongly suggests a phishing or credential harvesting attempt.

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://druttle.ru/wb?keyword=lol%20janna%20build%20guide PDF link annotation
    • http://polfact.site/7._snf_appearance_and_personality_testezni7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382638/normal_5ff8fd22c4586.pdfIn PDF document text
    • http://leqqurint.online/4._2_creditos_mercantiles7gdql.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_601f99f5cf015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_600ce66a7abd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446017/normal_5fcf42a8ad5d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392667/normal_5fefa9667270e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476133/normal_5fd927b454fef.pdfIn PDF document text
    • http://differencecheats.net/rock_guitar_hero_songs19ygt.pdfIn PDF document text
    • https://cdn.sqhk.co/kadeposamo/7kififk/ticket_to_ride_for_playlink.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392857/normal_5fc8a03ba7044.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nudifezidezi.rf.gd/47434277187.pdfIn PDF document text
    • http://ripomozenawigi.rf.gd/23317427492.pdfIn PDF document text
    • http://xijovapafibowuw.rf.gd/barlow_condensed_medium_font.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_off0000d9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B2 4876 bytes
SHA-256: 84bd02795d39a49c59aaa520bea8174c62c241aea18684373654e7a747c7a525
font_01_sfnt_off0000ea60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA60 10896 bytes
SHA-256: 870c9ccd6f0ccd082d7c9d13cbb155f2c5fbbc63911353376ddea3028ebadfa2