Malicious PDF — malware analysis report

Static analysis result for SHA-256 edae33e25f44f12d…

MALICIOUS

PDF

79.5 KB Created: 2021-09-09 05:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e0d2088c8a66734292b5f4d02d439f9a SHA-1: dedb35dba95a72f80895805d67242e23a156bebf SHA-256: edae33e25f44f12d23fcd31d0b719c06bdccc6a61258fe842e398b982d2cc9af
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to suspicious domains, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://securitydm.net/slicice/file/dufizemotixunup.pdf In PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/8379662962.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/53310186106.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/9b0913787b4886fae27ddce69faf6d3a/wogezukokirapet.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/53452680561.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/29658470308.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210907024827.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613910836d61a---vokugozeminakabisenef.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///86676117541.pdfIn PDF document text
    • http://skalamatbaa.com/userfiles/file/3402533750.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/wonez.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/zumukusapuxo.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/56219486806.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/56756763922.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5107bd1a1---dibezezejujafevadivokekit.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/rorogovasu.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/23117567181.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/20005745216.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/fusev.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/49301809320.pdfIn PDF document text
    • http://luijkzonwering.nl/image/file/guxulujekukupokut.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/gukajuku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=volume+control+on+androidPDF 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_off0000c9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B5 10432 bytes
SHA-256: 61fb03a8935c07edf6dbe54b94af53d0aae5b30b43e537ca115e7aa1628c6947
font_01_sfnt_off0000e14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF961 21052 bytes
SHA-256: 6326123b62063ca0da63eb2ce59b9abacaac3d6f5711b324ea626576ba8182e1

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