Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c013938fd1a37f…

MALICIOUS

PDF

72.1 KB Created: 2021-03-30 03:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c59d959b488c9f38827d6618477b07d6 SHA-1: 61e53aee859527cb8ada2b99fa60b4dfc90729d2 SHA-256: 33c013938fd1a37fa17533f4351b1c25853d87552be53cf4eb29b36081bdb372
96 Risk Score

Malware Insights

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

The PDF 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 a suspicious URL, which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to "Kagan structures cheat sheet" to entice users to click the malicious link.

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://pelibifir.ru/strik?utm_term=kagan+structures+cheat+sheet
    • https://naranopaxak.weebly.com/uploads/1/3/4/7/134700574/21d22e0fd6a69.pdf
    • http://erogan24.website/dekinedutoj7gqcr.pdf
    • https://rirosivipoxutu.weebly.com/uploads/1/3/2/3/132302830/gukego.pdf
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/gapekutimivukabad.pdf
    • http://lastmarkt.ru/mirulix441h.pdf
    • https://duxetaxegijojem.weebly.com/uploads/1/3/4/8/134870405/zosomadopa.pdf
    • https://basalolevezuw.weebly.com/uploads/1/3/1/6/131606508/7686624.pdf
    • http://bestplacefor.rest/golf_clash_wind_chart_max_mid_minfklx3.pdf
    • http://helpcreditscore.info/toyota_techstream_2020_download_windows_72dh2w.pdf
    • http://free-at.pro/dunibupubusge7s.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_4dbcf41e567047a59657d9a4f5c37361.pdf?index=true
    • https://s3.amazonaws.com/kuboki/hp_laserjet_p2015dn_driver_free_download_for_xp.pdf
    • https://s3.amazonaws.com/tipikaxe/zaweveramuvujulakeragales.pdf
    • https://s3.amazonaws.com/mukutud/us_visa_application_form_from_dubai.pdf
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_8efa10d51c404c3188f45cfcb3871351.pdf?index=true
    • http://vuzelupuz.rf.gd/lurepegudaduzegatud.pdf
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_c30c7666b3664f9c8edc00dc706904f5.pdf?index=true
    • http://zagopemolal.rf.gd/ansible_2._4_documentation.pdf
    • http://jixojamut.epizy.com/acer_model_h236hl_manual.pdf
    • https://s3.amazonaws.com/lodazojamuva/wewipejizedugof.pdf
    • http://bovofekigigewij.rf.gd/newuwukaso.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_off0000dafa.bin
10bc37e4fa5dd6682e23d983b1faa3e1dd1ec84b9956ff9462df78599fad1b5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFA 5000 bytes
font_01_sfnt_off0000ebfc.bin
6eab18293e123f449cb5759ae765880c61b89ba6aeb96c63799ab9fd385847ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFC 11680 bytes