Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d9acd2efaaee6d…

MALICIOUS

PDF

75.7 KB Created: 2021-04-16 21:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 73a8aaddc1e3da471524fbc61268a29d SHA-1: 591a185e9a5f6ec31f4dec2ce27df8514b67210a SHA-256: 09d9acd2efaaee6dd59fb9434289913b5d7033e6452fdfcdbfd78e7c3ff8a9f2
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a remote-support lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://ponafet.ru/strik?utm_term=asus+rt-n66u+asuswrt-merlin+firmware PDF link annotation
    • http://pshcomonhere.xyz/concatenate_in_access_reportkejci.pdfIn PDF document text
    • http://kigadotezolesun.mypressonline.com/3139249720.pdfIn PDF document text
    • http://medgaj.com/c_standardpy441.pdfIn PDF document text
    • http://labincom-med.ru/alveus_formic_20_a55oopf4.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/ghbmpgd/dudoderarog.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/Ajfieib/39964770022.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/znzgfig/6940217063.pdfIn PDF document text
    • http://nuxefigemotak.22web.org/1518500054.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/butovaguxoler.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/corrugated_metal_roofing_sheets_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/25800717772.pdfIn PDF document text
    • http://pavafisufopu.myartsonline.com/14947924049.pdfIn PDF document text
    • http://rumigabel.epizy.com/cables_and_connectors.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/61183976019.pdfIn PDF document text
    • http://vawirir.atwebpages.com/tumores_benignos_pulmonares.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/97384218304.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC20 5180 bytes
SHA-256: 32ea8c7ccaf49f62f2665c096d8c9899903a381b806464c0e4f7702b239006dc
font_01_sfnt_off0000fdc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC6 10596 bytes
SHA-256: 89d86be51390f0c49eecdd5ea782d8b0cd1d2ffaa7f1b3e6d444e4899dd71e80