Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea2ab74b0e34e20…

MALICIOUS

PDF

80.9 KB Created: 2021-09-09 08:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d08347c6b9289f9fb71f4afb4d1da41f SHA-1: fd9f3e40bc4bdb0ce229122c3d0c174262cef7e7 SHA-256: 3ea2ab74b0e34e20fb83d615d84133841c52cd039778505204487408e5067db1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple unknown URLs, some of which are hosted on disposable domains. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://ilyxrace.com/userfiles/files/nojekanesuk.pdf In PDF document text
    • https://huanghecables.com/d/files/pogofomodumazonuk.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/mofejonarawef.pdfIn PDF document text
    • https://petala.gr/userfiles/file/14951402570.pdfIn PDF document text
    • http://ilsungwarehouse.com/userData/ebizro_board/file/pafetixevobonadazome.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/49730142789.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-1/20210901191729713053.pdfIn PDF document text
    • http://skomi.ru/img/files/file/lurasenikulimaxamifatuzaf.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/33564119389.pdfIn PDF document text
    • http://delve-cr.com/uploads/50767253853.pdfIn PDF document text
    • https://escolaalfa.com/userfiles/file/wubolovogudefaga.pdfIn PDF document text
    • http://rem-stroymont.ru/img/file/32248597557.pdfIn PDF document text
    • https://kar360.com/resimler/files/kuvupedux.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/wosotabiku.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133661e29e2a---31248375462.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/jutavano.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/68685916358.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/94753666871.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210909113741.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/kiwozi1630735373.pdfIn PDF document text
    • https://mi-stores.com/basketballtotaal/images/editor/file/97093335946.pdfIn PDF document text
    • http://modern-pro.ru/files/file/roludowego.pdfIn PDF document text
    • http://bjjiffy.com/upload/31902022196.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=windows+10+free+download+iso+file+with+product+keyPDF link annotation
    • 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://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_off0000d844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD844 16492 bytes
SHA-256: b355699441dc378d57082d2cdd7911ea0aa7aafce623c07bb7268f8dcbc6590c
font_01_sfnt_off000102e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFE 11276 bytes
SHA-256: e03eb7fe00821e87f61992c7cc67638232923522adc460ac93874c4d9aa86bd4

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