Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b2ee443ace0c9e…

MALICIOUS

PDF

81.7 KB Created: 2021-09-11 08:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b718298564ff30101bfdbb3fa759be12 SHA-1: b13e3f4e1c348f1132927e6f78f53d9caa4b1993 SHA-256: 94b2ee443ace0c9ed3c6e2f01a76579742c0dcad9ecc789f2570dcb6c60ef66e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high number of embedded URLs pointing to various domains, indicating it functions as a link farm. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the 'ML_NYX_PDF_MALICIOUS' score strongly suggest malicious intent, likely to redirect users to phishing or malware hosting sites. No scripts were extracted, but the structure itself is designed to facilitate malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://emblem4home.com/UserFiles/Member/File/57238082825.pdf In PDF document text
    • https://asiastudy.in/ckfinder/userfiles/files/4237565568.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/60386525894.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/21632638897.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/19172480865.pdfIn PDF document text
    • http://finara-v.com/file_media/file_image/file/16650940962.pdfIn PDF document text
    • http://yilbasipromosyonu.com/userfiles/file/83603884810.pdfIn PDF document text
    • http://mamtaniketan.com/userfiles/file/suradaxadazisawaridopin.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/2391837677.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/59686279368.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/kenavodamifimepubuwuwe.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/gubixiw.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/a8f646d6b13c81ee8e807e87e42d681a/42070254958.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/xurizuvib.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/64222760993.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/89236961061.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/pipukifiwojugivajejufuso.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/nasazofazadavuvejaj.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613120c035ab7---34440653459.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/dozobebalalavujopefa.pdfIn PDF document text
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/vemabakeselubiso.pdfIn PDF document text
    • https://stiglic.sk/userfiles/file/53676493464.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/66764668436.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=dark+souls+level+up+calculatorPDF 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_off0000d889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD889 18616 bytes
SHA-256: 675bcac0eaf78ab332d78ffce676d2744475dd025f8a32662f0c5d13bbd62c1e
font_01_sfnt_off00010972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10972 10428 bytes
SHA-256: 30bce32632b6340a9af5f624a605e207d4b486e1fda1dcc74262e188d4eaee94
font_02_sfnt_off00012158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12158 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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