Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2e30fd6738cbde…

MALICIOUS

PDF

79.3 KB Created: 2021-03-10 05:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c2a15c8d267cec9c570bbd3a254b77ad SHA-1: 3c4b959e7e04b703701eac96ee4836d1e57b3214 SHA-256: 9d2e30fd6738cbde40f0479acbf974ba5a690cdfcf724bc38e4125654d5038d7
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://jacksth.ru/aws?utm_term=romeo+and+juliet+act+3+questions+and+answers+quizlet PDF link annotation
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/5827786.pdfIn PDF document text
    • https://vogavowaxataner.weebly.com/uploads/1/3/4/2/134266619/5698751.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/08c1788c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470209/normal_5fe40fdc5f450.pdfIn PDF document text
    • https://vuloribogisoso.weebly.com/uploads/1/3/4/6/134655424/0cf25c03a.pdfIn PDF document text
    • http://saxumoru.iblogger.org/what_are_the_key_elements_of_culture.pdfIn PDF document text
    • http://kivakiwije.iblogger.org/samsung_refrigerator_rfg298hdrs_ice_maker_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475559/normal_6026f2fd40337.pdfIn PDF document text
    • http://zazuvivilug.iblogger.org/difitajijabuxuxatogoxij.pdfIn PDF document text
    • https://domazatavaxagit.weebly.com/uploads/1/3/0/7/130775902/vamimedoreli.pdfIn PDF document text
    • https://tumogifizutuvo.weebly.com/uploads/1/3/4/5/134527103/duvunusatuwalutura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530846/normal_602d0d0f62d26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_6045053588ecb.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/punagilelabon/knowledge_to_action_framework_template.pdfIn PDF document text
    • http://xumesata.epizy.com/zagut.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/62534407921.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/24060550545.pdfIn PDF document text
    • http://fodapimogu.rf.gd/what_is_the_role_of_systems_engineer_in_infosys.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/skin_analyzer_software.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/how_to_always_win_at_football_betting.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/xerurelofitumumu.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/jafaw.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_off0000f860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF860 5600 bytes
SHA-256: 2a954523b9c04812f70aab6dc2f7b6a095e845eb587b64c3f2b373de837897c5
font_01_sfnt_off00010b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B73 10508 bytes
SHA-256: 92b32888dd5f8a8a0a766f30f5ac1356b96dde3d50efbf74d827569c9d3137ef

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