Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d25b5e65cd3776…

MALICIOUS

PDF

66.8 KB Created: 2020-11-11 18:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2e3395603528e40c20a17c604502f7e8 SHA-1: 540c7aaf6a5a1c8fbd49d1eaac68dff365be1651 SHA-256: c9d25b5e65cd377611a1a6c6793cd5b9fcf3300c9b5134cb2d2925dcc017530d
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://trafffe.ru/strik?utm_term=the+judgement+day+device+pdf PDF link annotation
    • https://makonajarozov.weebly.com/uploads/1/3/4/3/134341931/selusus-noxidupob.pdfIn PDF document text
    • https://kipamafulu.weebly.com/uploads/1/3/4/5/134588126/ece70ff70.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/vovofofaverun_sawivurovoj_nifawubazox.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/kisimujuk/74232550296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aa15f01-f5b4-43d8-8b72-fb4fc3aebb58/youtube_the_giver_chapter_12_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/bamboo_cay_hawaiian_polo_shirts.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/voyage_to_the_galapagos_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/26670986982.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/35403202830.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/stoichiometry_review_worksheet_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/rozetopetepexupiwig.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/fusatesatewaxesagik.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_off0000c6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A3 5448 bytes
SHA-256: dd605ae3afc2fdc1994025eb481d5e6cf2574bca9cd6887f182761a3e6723b87
font_01_sfnt_off0000d927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD927 11028 bytes
SHA-256: 9d9bf42699de4e965519efb9289dfe82dcf45c3796cd0c573af9e8651f9c05ed