Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab164966218cbe0d…

MALICIOUS

PDF

86.2 KB Created: 2021-04-06 03:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faaeb91de372ea613e9ab0580ce52551 SHA-1: da1ce1e6dda87a00c6d562c11207625e8e66a41b SHA-256: ab164966218cbe0d987252022738fda145dafe668dd3eac2e2bde1fa84d1846a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when visited, appears to be a search result for a textbook. This URL is likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, and the PDF structure itself contains an external URI pointing to a suspicious domain.

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://leonvi.ru/award?keyword=medical+embryology+textbook+pdf
    • https://mapuxotegudu.weebly.com/uploads/1/3/4/3/134356271/da7c7173c.pdf
    • https://static.s123-cdn-static.com/uploads/4444357/normal_5fef47f0723d5.pdf
    • https://cdn-cms.f-static.net/uploads/4491433/normal_5fdc392c59e93.pdf
    • https://polaposegit.weebly.com/uploads/1/3/4/5/134591324/3261433.pdf
    • https://fumozowafujazuv.weebly.com/uploads/1/3/5/3/135331302/lurukirijam-gopubatagalog-mowelolenes-gewowedib.pdf
    • https://zadisoro.weebly.com/uploads/1/3/4/5/134525292/jewiwewilitav-dodatunupuzisav-tedagabiman-gukokij.pdf
    • https://cdn.sqhk.co/kafexobesa/uGfghih/bemaxatotuzaxexoz.pdf
    • http://gogovexo.22web.org/adobe_acrobat_reader_word_to_converter.pdf
    • https://cdn.sqhk.co/xafileme/aLihWig/business_strategy_2_game_mod_apk.pdf
    • https://cdn.sqhk.co/fimegasaz/ieQidjj/kitchener_guide_events_map_weather_station.pdf
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/9022588.pdf
    • https://cdn.sqhk.co/wigalefu/fihihei/lily_s_garden_cheats_unlimited_stars.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/girilifawuxi/intro_to_java_programming_daniel_liang.pdf
    • http://diveruwafulebes.epizy.com/lofitonisulaluzimalil.pdf
    • http://vibiwarufade.rf.gd/how_to_glaze_a_precooked_spiral_ham.pdf
    • https://s3.amazonaws.com/mokuwanibof/ganepifulomujovemurogamo.pdf
    • http://bizower.rf.gd/what_oil_is_better_synthetic_or_regular.pdf
    • https://s3.amazonaws.com/fexuror/ashrae_15_34.pdf
    • http://zixupikitudid.epizy.com/jepavurozuxamejebiwojasur.pdf
    • http://vubedarav.epizy.com/stock_markets_news_cnbc.pdf
    • http://vovajixavago.epizy.com/pedometer_android_apk.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_off00011274.bin
de03bf00843cc9b5299f738b6237ac2a755cda3d16556e7b8855f8bf422f6f67
pdf-font-stream PDF embedded font (sfnt) at offset 0x11274 5676 bytes
font_01_sfnt_off000125d0.bin
65c6451447e11ee7e9493b39d9273223e240b265d347e8f016b2d36b8c1a9c76
pdf-font-stream PDF embedded font (sfnt) at offset 0x125D0 10972 bytes