Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c712d358e6a09e…

MALICIOUS

PDF

98.6 KB Created: 2021-03-28 18:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1fa6305e760a0d43d06c0d48d7b73dd SHA-1: 5bb19eea1826d38cb8158941e738834719db40e1 SHA-256: 37c712d358e6a09e5c3625aa20e93226638c64fa21d6d4d28e7ff6ca9a985ef7
136 Risk Score

Malware Insights

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

The file is a PDF document that exhibits characteristics of an advance-fee scam, specifically a lottery or parcel delivery lure. The embedded URL and the document's structure strongly suggest an attempt to trick the user into believing they are receiving a prize or parcel, which is a common social engineering tactic. While no scripts were explicitly extracted, the PDF format can embed JavaScript for malicious actions, and the presence of external URLs indicates potential redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jacksth.ru/award?keyword=barron+s+toeic+practice+exams+2nd+edition+pdf
    • http://lnstagramcopyrightcenter.com/jaheira_romance_tob_guide49b26.pdf
    • https://cdn.sqhk.co/vasinabew/kgfyTkM/mine_rescue_day_2020.pdf
    • https://cdn.sqhk.co/xedogigiloli/ecGOfYo/jujafapefolugokitikigabe.pdf
    • http://chtotakoebezuz.biz/33062418516dru2t.pdf
    • https://cdn.sqhk.co/jutepoxof/h81Dvgi/kisiletepuwolagapeso.pdf
    • http://dompodklyuch.com/democracy_and_education_1916_p._239yhz8y.pdf
    • https://cdn.sqhk.co/tufuboloruj/QqXjgs2/57708799305.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://classkaod.ru/49866043466su9r9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nafibanefexex/support_s_adobe_com_thank_you_jsp.pdf
    • https://s3.amazonaws.com/bopuxosavubare/93605139963.pdf
    • https://s3.amazonaws.com/donukadizolin/sairat_full_movie_part_1.pdf
    • https://s3.amazonaws.com/xafaxotaful/63008863696.pdf
    • https://s3.amazonaws.com/toniseligiwuzux/integrated_headset_installation.pdf
    • https://s3.amazonaws.com/devuxuzejozam/wezonek.pdf
    • https://s3.amazonaws.com/xojafemori/free_rustic_wedding_shower_invitation_templates.pdf
    • https://s3.amazonaws.com/wuwabobujasivor/23762586828.pdf
    • https://s3.amazonaws.com/rokuwapesu/rewofo.pdf
    • https://s3.amazonaws.com/dukavunivifa/delivery_invoice_template.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_off00013699.bin
368847738d28751be3914af9d7565a7e10b4c250045efa5050b1e7ce4eae2cce
pdf-font-stream PDF embedded font (sfnt) at offset 0x13699 5520 bytes
font_01_sfnt_off00014957.bin
ac576d370f263e352ba704e46239c9d909452f11d5710d896ce43416d4f98a7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x14957 22780 bytes