Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50ee6bf7c73ac04…

MALICIOUS

PDF

81.8 KB Created: 2021-02-27 12:15:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 35f856a8962c57acf4ff7c489974159f SHA-1: eb8391a829dad65f4ec978bd5dddf79afe46aaec SHA-256: b50ee6bf7c73ac04a3bb01aef0bc50dc89822bb38b4255698ba4c2b4d36a826b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the phishing lure. No scripts were extracted, but the presence of numerous external URLs indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8706

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://jacksth.ru/award?keyword=how+often+does+league+of+legends+patch PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369496/normal_5fc8d163b6fdd.pdfIn PDF document text
    • https://radoxawema.weebly.com/uploads/1/3/0/7/130738714/mejof-lavupoliwuture-mejalilalaj.pdfIn PDF document text
    • https://worojipe.weebly.com/uploads/1/3/1/3/131382243/f97249c322510.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479213/normal_6006643117869.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466368/normal_5fccaddec0dd4.pdfIn PDF document text
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/wuriwunaxagadino.pdfIn PDF document text
    • http://semowatuk.iblogger.org/baal_veer_wala_game.pdfIn PDF document text
    • https://ritojajugub.weebly.com/uploads/1/3/5/9/135984917/4399c072a.pdfIn PDF document text
    • http://sekitubamonit.22web.org/58699482391.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418191/normal_60062e412b17b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453102/normal_5fe3af5d95183.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kejefutipetube.epizy.com/best_android_version_for_s7_edge.pdfIn PDF document text
    • http://popeladidet.epizy.com/kasupo.pdfIn PDF document text
    • http://zelobiliteriwe.rf.gd/heart_shaped_stethoscope_vector_free.pdfIn PDF document text
    • http://setudobebo.epizy.com/wordpress_themes_for_novel_writers.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/zubujopopujojikof.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/aqa_chemistry_gcse_revision_guide_online.pdfIn PDF document text
    • http://girakes.rf.gd/eenadu_epaper_today.pdfIn PDF document text
    • http://gagemusogigubew.epizy.com/adverb_word_search.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/pulse_secure_setup_client_activex_control.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/vukidafak.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/priority_matrix_template_word.pdfIn 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_off0000f9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AF 2984 bytes
SHA-256: 8f6b66f2d3c9ca996ff87e40f33597e9c5c74b8385f5a1716ed9de3537cee889
font_01_sfnt_off0001045f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045F 5376 bytes
SHA-256: 8202cca2352f039adcc96b9b49306520e1d9e89907be0724e500a7b1d7cec118
font_02_sfnt_off000116c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C2 15120 bytes
SHA-256: 2348c449e7a1cfcbc193dce867e4da4626aee7ec6f053bd8b61ebc5e9aee7a34

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