Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d58bfcebaa8cc7…

MALICIOUS

PDF

109.2 KB Created: 2021-03-19 09:23:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 743333112f6a3249bbd1fb399b7e8d1c SHA-1: 70709ba0d3823bad61ca7510a4e19bdd34c86964 SHA-256: 15d58bfcebaa8cc705a74be3b9e9d1fc82352adbe6c5c78269e60d3d740a3088
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'nipisod.ru', which is likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, contains text fragments that, combined with the URI, suggest a lure related to wine making. No scripts were extracted, but the presence of external URLs and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/aws?utm_term=in+the+process+of+wine+making+ripened+grapes
    • https://cdn.sqhk.co/lexujowina/fJfic3n/the_history_of_mali_empire.pdf
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5fdb170a2bd86.pdf
    • https://cdn-cms.f-static.net/uploads/4377902/normal_6045b87fa39f9.pdf
    • https://cdn-cms.f-static.net/uploads/4481154/normal_602acef021a1a.pdf
    • https://cdn.sqhk.co/kupuruvew/Tgghaho/91408698633.pdf
    • https://cdn-cms.f-static.net/uploads/4446921/normal_5fd9b99c9f0fb.pdf
    • https://cdn-cms.f-static.net/uploads/4424331/normal_603cf2e326874.pdf
    • https://cdn-cms.f-static.net/uploads/4419820/normal_603b4710224fd.pdf
    • https://static.s123-cdn-static.com/uploads/4446400/normal_6003f7d301cd7.pdf
    • https://cdn-cms.f-static.net/uploads/4497658/normal_603d8d88e5b70.pdf
    • https://cdn-cms.f-static.net/uploads/4460042/normal_60371cfc5d349.pdf
    • https://cdn.sqhk.co/bisuligiga/J6U1Pji/liverpool_football_club_news_now.pdf
    • https://cdn-cms.f-static.net/uploads/4478137/normal_602e5dc4bc604.pdf
    • https://static.s123-cdn-static.com/uploads/4478415/normal_5fc83c2127c62.pdf
    • https://cdn-cms.f-static.net/uploads/4416153/normal_602d7ab7d9b4a.pdf
    • https://cdn-cms.f-static.net/uploads/4491969/normal_600c8de280f62.pdf
    • https://cdn.sqhk.co/bureruverog/h5AEhd3/vuzezutijevolopanezel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gedexim/95109652188.pdf
    • https://s3.amazonaws.com/bitajemisajoz/watubi.pdf
    • https://s3.amazonaws.com/bulujono/battle_house_full_movie_720p.pdf
    • https://s3.amazonaws.com/zonivezada/allu_arjun_new_song_samajavaragamana.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016aea.bin
ea4b242061d43a6e6b8c8f6a6bf116fa9997ad7a1e3cd19ab359031485a4aa69
pdf-font-stream PDF embedded font (sfnt) at offset 0x16AEA 5632 bytes
font_01_sfnt_off00017dfb.bin
398ca84e3c83217ddff0604ac1506999e29c21245ec748ea261c0612b912f0d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x17DFB 12228 bytes