Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f1094cf5ab993b…

MALICIOUS

PDF

82.9 KB Created: 2021-03-15 10:43:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42ade20a91a03397f2f542cc861a21a7 SHA-1: 98d2d13bc9e9c846764bfcbdc55ecb2b4f89f02b SHA-256: b5f1094cf5ab993b534aec1f91d64dbaebe7fb48eeaf0f75c10ad6c50a6b3e8f
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are obfuscated or point to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external URLs points to an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=how+to+get+out+of+debt+and+save+for+a+house
    • http://winoraama.space/44853494692tis61.pdf
    • http://evgeniy-semenenko.ru/troy_bilt_pony_will_not_startqn7uh.pdf
    • https://cdn.sqhk.co/xawefigi/f2jbnIw/lidurozaxinaronabopijix.pdf
    • https://cdn.sqhk.co/kedilexele/jjwoxM8/50180180922.pdf
    • http://mandarin-fruit.space/cantina_band_star_wars_sheet_music_clarinetwy1yj.pdf
    • http://biweekamnf.com/43547696611c42ob.pdf
    • https://cdn.sqhk.co/xuxodokoju/EEDrgih/sniper_gang_apparel_discount_code.pdf
    • http://nitiwomifigurod.mygamesonline.org/22995067918.pdf
    • http://sitizinudex.getenjoyment.net/balanced_scorecard_adalah.pdf
    • http://pepariravifaza.getenjoyment.net/kiwedigomajoto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_6ae62499fb5848a99dc3bc2e75dfe1a3.pdf?index=true
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_b2cee3f8c0cc4f0d8f71f711279017a7.pdf?index=true
    • http://jofikuv.atwebpages.com/35986523604.pdf
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_0794636deea249f99b7f704144c0a8f4.pdf?index=true
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_d9713822a6084f3d8e745e09410647be.pdf?index=true
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_bba91ea87cd042dcbd2d1faf7cdd1fa8.pdf?index=true
    • http://manuwakagekewu.onlinewebshop.net/basics_of_modern_mathematical_statistics_exercises_and_solutions.pdf
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_de8f4dedf52f44938400e62234c0b3eb.pdf?index=true
    • http://pawuzax.onlinewebshop.net/koxigasovozebukoriwagibo.pdf
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_8250b47797a84af0abd34a4f55f1cf4b.pdf?index=true
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_254e91b3f8c84af0918c10e2c7691f0c.pdf?index=true
    • http://vomewudige.atwebpages.com/what_are_the_advantages_and_disadvantages_of_agile_methodology.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8f5.bin
994d0d4625ba6e4f283f133ae15007da7bf304dbc674b0b49de742ca8d8b60b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F5 5224 bytes
font_01_sfnt_off00010ac2.bin
4a165072e0ce52f7e72e5ae6e3f83a4acf1bd12f83858def7f52d39a77acab09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC2 10796 bytes
font_02_sfnt_off00012f7c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7C 4324 bytes

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