Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f4e50d9253e99f…

MALICIOUS

PDF

112.2 KB Created: 2021-05-13 01:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0ffd580e74075c497f73cd1965a2ac9b SHA-1: c08c1dcc2d6a2d57f9488c7a23c59def9db47d1c SHA-256: c6f4e50d9253e99f7faeaf0fd0634c064b086adddee5efa5e103bc3055dd90b4
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains an embedded URL pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The presence of LOLBin tokens in the document text suggests an attempt to execute commands, potentially leveraging exploitation techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://baarspo.ru/strik?utm_term=best+hotel+booking+app+in+india+2020 PDF link annotation
    • https://cdn.sqhk.co/risubibasero/gQVgejd/gizitejujul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_600f446d88fc5.pdfIn PDF document text
    • http://igme.site/73577511392pj4qm.pdfIn PDF document text
    • http://copyrightshelpscenters.com/juxerebajivavotagedungqm6w.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/cMD3Hib/42200213874.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/9Q6Gghb/jekokavufefowuzaba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417644/normal_5ff4cb788c1b2.pdfIn macro / runtime command snippet
    • http://hydraruzxpnew4af.exchange/nudefasepozavla7rb.pdfIn macro / runtime command snippet
    • https://cdn-cms.f-static.net/uploads/4472198/normal_601554fc1598b.pdfIn PDF document text
    • https://cdn.sqhk.co/nusatabi/Zja8egj/bovukabopesumov.pdfIn PDF document text
    • http://a-trvl.ru/juxizased15bh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413978/normal_5fd0c3bf8fee0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_60645d8b8809e.pdfIn PDF document text
    • http://lotsmen.com/99733556401yaroh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450504/normal_605f361ce40db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368768/normal_5ff7649f8674f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453734/normal_5ff5b94a8680c.pdfIn PDF document text
    • http://trastenmyqort.online/63537351105dtikb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424682/normal_60000983d7f3f.pdfIn PDF document text
    • http://salet.store/black_metal_world_map_wall_artwvhea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492245/normal_603fe43cc0a96.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/9Q6GghIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/96263840410.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/63172374643.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/10419029853.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/new_practical_chinese_reader_2_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/bavaxatenaxovatefabuto.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001642b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1642B 5652 bytes
SHA-256: 679e4a4e8f05eaed9e31b8858d9663c8dd3112b07d2efc0df354c6b6a82b6dc4
font_01_sfnt_off00017764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17764 11208 bytes
SHA-256: 42738432d70c79d0265497233976dbf5fd5fb6e52694afce3e0e8993ba9dd4ff
font_02_sfnt_off00019d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D40 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3