Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea90b1502649600…

MALICIOUS

PDF

67.4 KB Created: 2021-01-27 16:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d8521a918192094eadf207316cf2c9ab SHA-1: 27cc023240229fb58b39a8a6b9b2fd091470ae8a SHA-256: 2ea90b15026496008886a243b5915c4efb8c3c4b972ef5edd9aaa07b622f45bd
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a "PDF_SEO_LINK_FARM" which indicates a large number of external links, and a specific URL pointing to a link farm. The document body, though heavily obfuscated, contains text that appears to be a lure for a product. The presence of external links and the nature of the heuristics suggest a phishing or scam campaign designed to redirect users to malicious sites.

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://maypoin.ru/123?utm_term=super+sonic+plush+classic PDF link annotation
    • https://wusedutewaxugag.weebly.com/uploads/1/3/1/4/131437839/pajidas-fuzulajepe.pdfIn PDF document text
    • http://kotiwiwax.iblogger.org/pokemon_emerald_battle_tower_guide.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/makajatafarol.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/bibexabukizipuditet.pdfIn PDF document text
    • https://bunoworerut.weebly.com/uploads/1/3/1/4/131438217/wevuzaj-fonog.pdfIn PDF document text
    • http://sepibigejakina.22web.org/story_elements_worksheet_grade_2.pdfIn PDF document text
    • https://vesovagesigopek.weebly.com/uploads/1/3/4/6/134614223/nuzati_nolakupu_jisonowakeb_nojunixegiwulix.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/fulosobezur/zuvesanabuninufarimi.pdfIn PDF document text
    • http://lobidirubegevil.epizy.com/bizokexotutopenisanedure.pdfIn PDF document text
    • http://petetilazuji.epizy.com/kerboodle_practice_questions_answers_chemistry.pdfIn PDF document text
    • http://gonurorirezode.epizy.com/94910256519.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/delivery_invoice_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/free_microsoft_powerpoint_holiday_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/axonopus_compressus.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/76216967682.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/7284145367.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/javoxedu.pdfIn PDF document text
    • http://rawuwad.epizy.com/corporate_visiting_card_design_vector_free.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_off0000c9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E5 5124 bytes
SHA-256: 0e6e792d96cf2bd09a3b5a4a8195d6a9946c4743699293b38f04c169e782acef
font_01_sfnt_off0000db48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB48 10832 bytes
SHA-256: 8f9bc86797bbde3a5bd36bf0be949b95f88b229cdd5b0514f1d973b9bead137d

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