Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07f79c1570559bb…

MALICIOUS

PDF

75.2 KB Created: 2021-03-23 17:26:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8e0a800061bd734bafe5921b205ef137 SHA-1: 962c05b1bb3a18236016612bc60d9a27e217aad7 SHA-256: d07f79c1570559bbd9c9373eee9c7c366dcdddc5ba73985c218adcdcf8aa52c4
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 0.9997

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://xezojetit.ru/wix?keyword=free+body+diagram+worksheet+with+answers+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366057/normal_5fe39d3e5d927.pdfIn PDF document text
    • https://guxemufisi.weebly.com/uploads/1/3/2/7/132710659/8089388.pdfIn PDF document text
    • https://cdn.sqhk.co/wovegase/jJEUgif/xutovogediwaxipegop.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/3107954.pdfIn PDF document text
    • https://jifalutisapore.weebly.com/uploads/1/3/4/7/134772579/3933462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_601dae1caa0b4.pdfIn PDF document text
    • https://mabatuba.weebly.com/uploads/1/3/5/3/135303696/6563887.pdfIn PDF document text
    • https://guverududilo.weebly.com/uploads/1/3/6/0/136086053/658c4c.pdfIn PDF document text
    • https://cdn.sqhk.co/xexerekija/ibNgpTy/fekivevunevese.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/c84cdd.pdfIn PDF document text
    • https://kixakusafi.weebly.com/uploads/1/3/4/8/134891224/menej.pdfIn PDF document text
    • https://cdn.sqhk.co/rirelolut/egdxkij/mofijekitofove.pdfIn PDF document text
    • https://panubawo.weebly.com/uploads/1/3/5/3/135337149/4537136.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
    • https://s3.amazonaws.com/lopadivupudexa/1114537286.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/birth_certificate_correction_form_meeseva.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/scientific_notation_problems_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/acute_coronary_syndrome_guidelines_american_heart_association.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/37113510000.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/bill_checker_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/xofoxovoto.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_off0000d9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E7 5564 bytes
SHA-256: b832d51bb0884f366bde1c3defdb12d49f40aa9c996feda5a888d695f68c8934
font_01_sfnt_off0000ecbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBF 10696 bytes
SHA-256: 919a68b3fd04a58f6a98180f4d9a17aedbcf312bb1e4da5eb0ccd12e44016055
font_02_sfnt_off00011121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11121 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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