Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad8f003a29a0377…

MALICIOUS

PDF

79.6 KB Created: 2021-04-01 01:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 156ebf4b24e3f3304714fbeee2f6d826 SHA-1: aea12b47974efa9ded78a3556e309b9cff920dbd SHA-256: 4ad8f003a29a03779760240b1a29d401f1f739558dfec9a11073705199e7cb0b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, one of which is directly referenced in the document's metadata and appears to be a lure. The presence of these URLs suggests an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=barbara+sher+refuse+to+choose+pdf
    • http://mateguwokalidub.getenjoyment.net/character_counts.pdf
    • http://center-about.com/luxuloyfbdw.pdf
    • http://drilltech.info/save_the_fish_app_store23h8w.pdf
    • http://rabota-plus.club/wutiratugefuhn5.pdf
    • http://gedirobidepud.scienceontheweb.net/90816394165.pdf
    • http://get3creditscores.info/omron_hem-780_small_cuffoiv13.pdf
    • https://cdn-cms.f-static.net/uploads/4471240/normal_60355a8310eb9.pdf
    • https://static.s123-cdn-static.com/uploads/4409413/normal_5ff0c01b7dfc0.pdf
    • http://golomashvanna.xyz/bowflex_power_pro_specsz5099.pdf
    • http://wujasonuvilo.mywebcommunity.org/catfish_blues_tab.pdf
    • http://tersq.fun/1__3v22m1.pdf
    • http://yblda.fun/861941424805sngi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_59583ab329c64754bfe633eaa231f8c9.pdf?index=true
    • https://938a05da-450f-421e-a59b-0448473a402a.filesusr.com/ugd/cb5dea_fef14b87c086480e94ea1bbc546d8adc.pdf?index=true
    • http://paguxesij.myartsonline.com/augmented_reality_documentation.pdf
    • http://belibivizonojo.myartsonline.com/sony_bdv-e3100_audio_setup.pdf
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_3631b2d17e554dd2b5aff2a587c4f614.pdf?index=true
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_47c915afc3e346ab88ac66759bce0c49.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e741.bin
82909d2fca9f6393aa49cf8fe3da5f189d3b2f82dc07e7f4098c36adbfa87415
pdf-font-stream PDF embedded font (sfnt) at offset 0xE741 5128 bytes
font_01_sfnt_off0000f8c0.bin
136503b32ab02b19d3df1be99760d2c83c112d2413397b0f5b1395a1e1b356c8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C0 12568 bytes
font_02_sfnt_off00012177.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x12177 4324 bytes