Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d2c0c8d5d77f17…

MALICIOUS

PDF

78.5 KB Created: 2020-12-09 04:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e860ba7bc217af41978780359582858e SHA-1: d884e5461d31bce1a36e76fe69fec9efffb407b5 SHA-256: d2d2c0c8d5d77f17f895e770ee9e211a1cf37f8f8937db0ce1e793cb2fabf053
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 0.9997

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://trafftec.ru/strik?utm_term=blade+and+soul+classes+wiki PDF link annotation
    • https://degodowaserujes.weebly.com/uploads/1/3/4/4/134494515/fozuwizefod.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/nedafumitolefojolud.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/fezenur/lic_jeevan_shanti_plan_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/halloween_math_coloring_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/warebafexebiwoda.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/non_chronological_report_writing_frame_ks2.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/14788548054.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/flexural_strength_of_concrete_beam_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/verbal_behaviour_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/73222962854.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/reloading_data_224_valkyrie.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26A 5040 bytes
SHA-256: b037818a89eb1126ac045374cfc35ca5e2d4b038ae1a964e4ef49a3bb3ecc0e7
font_01_sfnt_off0000f3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BB 10264 bytes
SHA-256: 662dc910941f076c509905cafa92bb2d93329342b0de75ced69af30b499f7b75
font_02_sfnt_off000116b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B2 16744 bytes
SHA-256: b6e04a927c2012552519e1d950d70c0df76771797756fbc90fc2357d6becb0ad

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