Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5bd171cf38e20f…

MALICIOUS

PDF

86.3 KB Created: 2021-03-06 11:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ff964b5ac73bfbf509e18e8f6eaba1a3 SHA-1: df3d600f474e7824d503d9dd776d7625ab616c87 SHA-256: 8e5bd171cf38e20f2c83d1f45579a477115664145ba9a5e87f3ba485e497512a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. 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-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.
  • 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://soxebez.ru/123?utm_term=how+to+gain+rap+in+roblox PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494648/normal_5fc5b4bb343e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422390/normal_6004aff2e9e33.pdfIn PDF document text
    • http://rigares.iblogger.org/yevadu_song_cheliya_cheliya_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kipaselofuza/gmhf5ih/14120245079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410678/normal_6017378e701e9.pdfIn PDF document text
    • https://zewugijisisu.weebly.com/uploads/1/3/4/8/134885238/lukenugi-varebako.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5fc5c1b716a89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420019/normal_5fff77b440b10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382209/normal_5febd41d8aebe.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwopazeg/fvOdgga/geterokepapuvukifuzeni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_603b9577d16a4.pdfIn PDF document text
    • https://wovikuzejujitij.weebly.com/uploads/1/3/4/5/134506660/jozasuxowe.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/EMLdhjV/ditelakevinitilurejaji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://desetezovadu.epizy.com/38517435048.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/deshabhimani_aksharamuttam_quiz_questions_and_answers_2019.pdfIn PDF document text
    • http://riwuzapivegeb.rf.gd/game_templates_html_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/beholder_full_version_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/heat_resistant_sheets_for_roof_in_india.pdfIn PDF document text
    • http://suwedafi.epizy.com/fiwipirugosod.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/18725976411.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_off0001138b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138B 5072 bytes
SHA-256: 197f9841857b4f6708d465249ad5b28b6685f367547aab0dd8c71ea4f5a56313
font_01_sfnt_off000124f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F1 11660 bytes
SHA-256: 5aee125ec8c60596bb58535c1c4f5ca804a51d00b9900d7aabe66999e1c24692

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