Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c3858de92d23fe…

MALICIOUS

PDF

79.8 KB Created: 2021-02-25 19:17:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: af0da7ced370d15a105270088b97bc68 SHA-1: 72bfb897499ee00530fdf779dde6087c5dfcfb05 SHA-256: 18c3858de92d23fe42f95256c1d16427126a3fb0b180091486911c73b9f7a93b
196 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating a likely attempt to redirect users to malicious sites. The document body, though partially corrupted, suggests a lure related to iPhone ringtones. The presence of a password-protected archive lure heuristic further supports the malicious intent, suggesting the PDF is a precursor to delivering a more harmful payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jottigo.ru/award?keyword=how+to+put+an+mp3+as+a+ringtone+on+iphone PDF link annotation
    • https://setixifofu.weebly.com/uploads/1/3/1/6/131606861/bisat_bunus_fejajatike_pedox.pdfIn PDF document text
    • http://rp-youtube.fun/92106308751lp64z.pdfIn PDF document text
    • https://kufidadifijerid.weebly.com/uploads/1/3/1/4/131407945/e8228e.pdfIn PDF document text
    • http://relejovavup.22web.org/chicles_orbit_informacion_nutricional.pdfIn PDF document text
    • https://lipemegovaw.weebly.com/uploads/1/3/4/7/134766771/vatan_nivon.pdfIn PDF document text
    • https://gupekuvexo.weebly.com/uploads/1/3/4/6/134610658/2617142.pdfIn PDF document text
    • http://ygrash.website/dyson_dc41_disassemblyeqq4g.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/4fc62d6712.pdfIn PDF document text
    • https://vaxujorukub.weebly.com/uploads/1/3/1/0/131070318/litofaxova.pdfIn PDF document text
    • https://cdn.sqhk.co/xenaporo/RieoIDi/53911306787.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/mesotodimus/letipagub.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/2302088216.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/viwopilugigipitalapanuku.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/best_flight_simulator_for_android_2016.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_off0000fc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8E 5416 bytes
SHA-256: b52d7b79d7dae093206e900100f08962ba7b204112d342d1f33439dd3fa3c9ae
font_01_sfnt_off00010ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE0 10388 bytes
SHA-256: fe726b95b9eb2ab5dfd39512a0aef758b38b9e50d8afcb013afebb27d2ef0bbe

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