Malicious PDF — malware analysis report

Static analysis result for SHA-256 5436843a82751691…

MALICIOUS

PDF

74.9 KB Created: 2021-03-07 23:50:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: fddd62b65b4920d5a29b283ff712962d SHA-1: 4f9b4a4f8f56db77a95b2cde779b5bd683ae2159 SHA-256: 5436843a8275169158cfec4622f51a6776fb6b7fbaf79047119fcada8420ae46
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 pointing to PDF files, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://botokaw.ru/aws?utm_term=grade+3+science+worksheets+pdf+free', is presented as a search result for educational materials, likely a lure to direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

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/aws?utm_term=grade+3+science+worksheets+pdf+free PDF link annotation
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/4981367.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485163/normal_5ffb1700937d6.pdfIn PDF document text
    • http://durebemidiges.getenjoyment.net/you_can_heal_your_heart_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488574/normal_6033b8092f2e3.pdfIn PDF document text
    • http://zutelotojenexop.getenjoyment.net/what_are_difference_between_distance_and_displacement.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/xawibaso.pdfIn PDF document text
    • https://budasanufewe.weebly.com/uploads/1/3/5/3/135323580/6528731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387241/normal_60386e8420636.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/kd_tripathi_pharmacology_book_8th_edition_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501980/normal_5ff144ccb114d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495241/normal_5fe0bcffd1016.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/gopuze/victory_belongs_to_you_gospel_song.pdfIn PDF document text
    • https://14319df0-7947-4f0d-bbb3-eaa17d5eb23e.filesusr.com/ugd/c45f38_b68455e2025d4a29a984a3e8e96f48d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/37999897029.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/garmin_920xt_band_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/41382253078.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/advantages_of_modern_technology_in_agriculture.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/belufowu.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/8568247119.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_e85c0d85cebd4a50bd4b6eb3538d41bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waxapoz/xosewurirulazobimeviza.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_off0000e7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E7 5560 bytes
SHA-256: fc4583aab3dd62387c7c29dfa2ded320ea7b152e3b4a0cd2e4bc8970a5504840
font_01_sfnt_off0000fae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE3 10376 bytes
SHA-256: ce132db3131574ed680cecbc2fc596bb91091916ed8d64aab818f1dec958a8af

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