Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d665708cd46bf93…

MALICIOUS

PDF

83.4 KB Created: 2021-03-19 14:17:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: c45b67385399aab72c020a00372fb29b SHA-1: be3921d1b6e23b55585a354fec76c16548c7712c SHA-256: 6d665708cd46bf934ac7670fe0b0c7a5874c5d7c91330a871358ce22dad6323d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-themed, suggesting a link farm or content farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious sites.

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://botokaw.ru/wix?keyword=personal+nursing+philosophies PDF link annotation
    • http://xotuvezaramapez.22web.org/kalendar_kuda_2019_malaysia.pdfIn PDF document text
    • https://wireluxibesoz.weebly.com/uploads/1/3/4/4/134402736/kenekenu.pdfIn PDF document text
    • https://jaxemojemilela.weebly.com/uploads/1/3/4/6/134622921/b5b5ad.pdfIn PDF document text
    • http://dukepiweg.iblogger.org/vuxekedexobavekof.pdfIn PDF document text
    • http://juvugewit.iblogger.org/saint_gobain_false_ceiling_catalogue.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/kokesatodixon/friends_show_quiz_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/ratiroxot.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/kabumadawapusonas.pdfIn PDF document text
    • http://xexewul.epizy.com/biocentrismo_robert_lanza_download.pdfIn PDF document text
    • http://kajifota.epizy.com/android_auto_resize_textview_github.pdfIn PDF document text
    • http://bukumetaboxalo.epizy.com/xagerivivezupa.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/esc_guidelines_cteph.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/aws_billing_reports_by_tag.pdfIn PDF document text
    • http://ragidunu.rf.gd/segowedigej.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/graphicriver_file_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e1c4495-229b-4c57-a3fb-83b580ac6c83/xojikelakatigipozawagasu.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/avira_antivirus_pro_apk_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/the_animator_s_survival_kit_book.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/bill_of_lading_short_form_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1b3b66-b0b0-4858-8c5a-7f63cd652816/kixavapatuwimofepe.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_off0001091c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091C 5080 bytes
SHA-256: e5ac2d62c652f4977e113f99e04f3c888da47c98d3d8441c9338025de276c4e4
font_01_sfnt_off00011a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5C 11120 bytes
SHA-256: 2d7750bd4ecf4865906993b47cfba625eaceae040a517bc61fb40d4efee63d6a

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