Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc594d942a7c2a9d…

MALICIOUS

PDF

86.8 KB Created: 2021-04-11 16:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ce1c1184ac484c51a2468ecb53773b59 SHA-1: 2ca16564de85216d89be6187637f611820f70a2d SHA-256: fc594d942a7c2a9d7f033a055ec13bed7f75e6a5e79f5e3c373698a9080a7e5b
176 Risk Score

Malware Insights

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

The PDF contains a malformed stream and a large number of external links, indicating it is likely a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards an attempt to redirect the user to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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=hunter+douglas+powerrise+remote PDF link annotation
    • https://cdn.sqhk.co/dodagirojep/fQUczhd/8713485348.pdfIn PDF document text
    • http://kijekidajefi.getenjoyment.net/56958837393.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/RjdSka3/create_a_list_in_python_for_loop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lamupimifuban.onlinewebshop.net/napekekekofa.pdfIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_85e928ce0b5a4936abed1a785d4ee17f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/37682751114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c15a29e1-79f5-457c-80f4-a44649214ed4/emotion_thesaurus_sadness.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/64057206053.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/39639483044.pdfIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_7c62b1a59dfb43b0830bdcad3a64e9bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bokelur/gunula.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_e45642db52e3494dae312f077d805d90.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/vizio_e480i-b2_stand_screws.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/97150551229.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/bluebeam_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74bad7b-2f61-40fb-a5db-4af98b1bcb00/stihl_hs45_hedge_trimmer_fuel_tank.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/lesife.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001075c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075C 5216 bytes
SHA-256: 90df3a304a138789d5556a1137c5d477658181e0aa2d59314f8fae434c7b929b
font_01_sfnt_off0001190f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190F 11288 bytes
SHA-256: e8c753bda56edf5732b2f459528c6e94baa826015087020812f495e2f8109503
font_02_sfnt_off00013f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F70 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.