Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf417ce086bb86cd…

MALICIOUS

PDF

75.9 KB Created: 2021-02-25 07:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 164f440f5b7d37eae2c827ca737981db SHA-1: 92977fd87b3e89aa0080280db0812e0f3368092d SHA-256: bf417ce086bb86cd648ac4e027317d0a374c722705aa09acd7ed5c21d9b75427
156 Risk Score

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 0.9998

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://druttle.ru/wix?keyword=simple+solutions+math+answers PDF link annotation
    • https://sudodufutela.weebly.com/uploads/1/3/5/9/135960501/rugosuxisefukugadu.pdfIn PDF document text
    • https://fogunovavak.weebly.com/uploads/1/3/2/6/132681822/pitekonetesipifara.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/8687865.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/cfe67c.pdfIn PDF document text
    • http://petersikdar.com/cdma_full_form_in_managementy61en.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/kirufejowigikavasanu.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/wuwopamedazu.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/22486692058.pdfIn PDF document text
    • http://cparta.moscow/zevafikasizanogovagobebod9j8f7.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/patotale/nanda_nursing_diagnosis_book_price.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/dark_souls_3_save_file_download_ps4.pdfIn PDF document text
    • http://fuzariwa.rf.gd/call_voice_recorder_apps_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/twitter_video_for_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/60249472565.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/59191561329.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/autonomic_nervous_system_table.pdfIn PDF document text
    • http://vunonam.atwebpages.com/gezuporezal.pdfIn PDF document text
    • http://nozuwodapa.epizy.com/balegagunobegalokolufupeb.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_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 5256 bytes
SHA-256: 37c5ac362ceeb4134d38fa4f336edf174d3f558b9049aa3e9581dac1913fa379
font_01_sfnt_off0000fe96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE96 10412 bytes
SHA-256: 1cb650b1c8b3471ac2d637e90293c6257fc57cce6da53035c8ab216a8f28cb70

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