Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a06ba2d5cc66272…

MALICIOUS

PDF

77.6 KB Created: 2021-03-26 05:50:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65ca36a004d5c2344a526c6ce5cd5841 SHA-1: 7386b1e12eddbddc5ea3f7794eff32df1c5149ee SHA-256: 8a06ba2d5cc6627227adfbe82892044040e22176b74e603b7974fc4c676de472
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to Google Sheets functionality, but embeds a malicious URL. This URL, 'https://dafemum.ru/123?utm_term=highlight+duplicate+cells+google+sheets', is likely intended to redirect the user to a phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://dafemum.ru/123?utm_term=highlight+duplicate+cells+google+sheets
    • http://daludaja.getenjoyment.net/14340141593.pdf
    • http://rofuxipof.mywebcommunity.org/cat_in_the_hat_babysitter_scene.pdf
    • https://static.s123-cdn-static.com/uploads/4368506/normal_5fe2787425e9d.pdf
    • https://cdn-cms.f-static.net/uploads/4426551/normal_6023c329c8e3e.pdf
    • https://cdn-cms.f-static.net/uploads/4418972/normal_601c6fd4a9dd9.pdf
    • https://cdn-cms.f-static.net/uploads/4458634/normal_5fda6d5c3fab0.pdf
    • https://cdn-cms.f-static.net/uploads/4487632/normal_601bc299449a5.pdf
    • http://xepuxupipe.mywebcommunity.org/59487269747.pdf
    • http://palaxofivuleduj.medianewsonline.com/85952004104.pdf
    • https://static.s123-cdn-static.com/uploads/4446390/normal_5fecfaf45e3bf.pdf
    • http://nosilekexiwot.mywebcommunity.org/best_time_management_books_for_college_students.pdf
    • https://cdn-cms.f-static.net/uploads/4480423/normal_6049d74881266.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5c5b1bee-c346-4d46-a4b5-18f9708189f0/taco_bell_quesarito_nutrition_facts.pdf
    • https://uploads.strikinglycdn.com/files/e740e001-f2d0-455a-a9c3-efcc3eac5dc6/best_stock_market_books_for_beginners_in_india.pdf
    • https://s3.amazonaws.com/tanapilamaxi/baudrillard_simulacra_and_simulation.pdf
    • https://uploads.strikinglycdn.com/files/bde6697a-1476-4725-bbc8-f1dcadb44b6e/6762636207.pdf
    • https://s3.amazonaws.com/wibedubosateg/anatomia_de_cadera_y_pelvis.pdf
    • https://s3.amazonaws.com/nasitevu/86107164213.pdf
    • https://uploads.strikinglycdn.com/files/3733c1b3-1ee9-446d-82db-bea3b02b799c/old_school_listening_music.pdf
    • https://s3.amazonaws.com/bokofapig/15471206969.pdf
    • https://uploads.strikinglycdn.com/files/15ee02ae-2f63-4871-85a8-73045b85eadd/sozubabapuken.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_off0000ef25.bin
1ac8130137322348053e3a9b5dce2ef6b33adc3a350c8acbab042ff64d215e39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF25 5200 bytes
font_01_sfnt_off000100d5.bin
21ce9f9ebad01ed51c1b514178694f9f9278354b1a189c9102a8ac47b873d0c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D5 11888 bytes

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