Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eee00107cdd3855…

MALICIOUS

PDF

101.5 KB Created: 2021-03-20 06:01:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee569a077fe87dfe1fa00feedfb7b8d7 SHA-1: 399a0307db760a571f4a573c3fedd971a3303761 SHA-256: 2eee00107cdd3855983830ba9e14bbfcbeafd23bcacfe95332035aebbf02d842
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which are disguised as educational resources or document templates, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure itself is designed to facilitate the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=go+math+grade+7+answer+key+page+195
    • https://gojupisot.weebly.com/uploads/1/3/4/0/134016698/03f1ca02.pdf
    • https://cdn.sqhk.co/tokebamojos/5iciihe/game_studio_tycoon_2_guide.pdf
    • https://jadipiruw.weebly.com/uploads/1/3/0/8/130814676/zediwipifame.pdf
    • https://cdn.sqhk.co/xafeperale/gePhgji/68194721397.pdf
    • http://afterdealer.pro/fafakuxurevawozzh14z.pdf
    • http://easterthjg.com/determine_the_indices_for_the_directions_shown_in_the_following_cubic_unit_cellfkita.pdf
    • https://kuvugelovusilu.weebly.com/uploads/1/3/4/4/134437140/nunamuvegajel_zijemefejuge_jafarab_linala.pdf
    • https://dojoxokixen.weebly.com/uploads/1/3/4/8/134878929/a5bf1a9daac3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ximupuv/75234716637.pdf
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_7c4340a21a6d4a08ae95d75c02647ce3.pdf?index=true
    • https://s3.amazonaws.com/selivuvumepaveb/vs_code_format_on_save_not_working.pdf
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_698952266e3e490b810defc348413dc5.pdf?index=true
    • https://s3.amazonaws.com/labitajaxatufib/joint_venture_contract_template_uk.pdf
    • https://s3.amazonaws.com/didowugorokirug/60646455786.pdf
    • https://s3.amazonaws.com/bomifabipi/1_man_bivvy_with_sewn_in_groundsheet.pdf
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_6202a50b10c048878c66b81bef8014d6.pdf?index=true
    • https://s3.amazonaws.com/gazivemon/tecnica_paracentesis_abdominal.pdf
    • https://s3.amazonaws.com/gogoxowiniza/lixesaxasaguvugotufusovun.pdf
    • https://s3.amazonaws.com/fexuror/alter_ego_4_b2_guide_pedagogique.pdf
    • https://s3.amazonaws.com/rovuweraja/katelerer.pdf
    • https://0aed7b51-d02b-4864-a6bb-b478bb809667.filesusr.com/ugd/fbdaab_7414e14f21fc41a3b4ebdaf71bb4ef23.pdf?index=true
    • https://s3.amazonaws.com/dekogamik/iso_14001_internal_audit_report_sample.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014a52.bin
164e3f35fc4d46533aa3fdd0b78bd8420919fedb26bb249de4d2532d5cdac444		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A52 6040 bytes
font_01_sfnt_off00015ede.bin
9616d871f0b0789e7018a8b7a5c1c3eb769010711a7b466bee600d42c28a40a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15EDE 11764 bytes

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