Malicious PDF — malware analysis report

Static analysis result for SHA-256 24cf4315277141f8…

MALICIOUS

PDF

70.3 KB Created: 2021-09-19 05:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e5958e48632f858e64e81bf326a915e SHA-1: bd77d3fe4d81e355899be4bca3b9414ec99b3a40 SHA-256: 24cf4315277141f8b0bf2ec902c38e00ff06cfbe258635dceb2d8d0502bba2dc
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting and exhibiting characteristics of a link farm, suggesting an attempt to redirect users to malicious content. The presence of an IP address literal in one of the URIs further indicates a potentially malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://clinicaveterinariagoitese.it/userfiles/files/35802793295.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614224345cdef---tomuzusutalutozogo.pdf
    • http://dragoniresorts.com/userfiles/34418224143.pdf
    • http://newo.ru/files/files/9340578718.pdf
    • http://akatumusics-ang.communication-pro.fr/public/1283/contenu/file/ramozexugopikakifoxuni.pdf
    • http://www.euro-fly.eu/userfiles/files/manipudadofurukaguvigeb.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338a5512f06---jopepu.pdf
    • http://syuncyoku.jp/upload/file/nunivotifitowafa.pdf
    • http://ukrfirework.com/images/file/61866364406.pdf
    • http://huntland.hu/upload/file/filumorekegafaxoxuwiwosa.pdf
    • http://architettodrabeni.it/userfiles/files/vijifarajetazeri.pdf
    • https://etcbt.com/userfiles/file/punubu.pdf
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/52325113162.pdf
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/14758998755.pdf
    • https://movimientofamiliadejesus.com/images/uploaded/file/xamoresowud.pdf
    • https://martan.es/cenavarra_userfiles/files/90332375244.pdf
    • https://vinaarc.com/app/webroot/files/ckfinder/userfiles/files/62038380657.pdf
    • https://wintechindia.in/ckfinder/userfiles/files/ratiduvulofuwo.pdf
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/jifujumetawujegoduj.pdf
    • https://europacreativaeuskadi.eu/files/galeria/files/sixolanusemizemojazufeju.pdf
    • http://laguna.piyawatgroup.com/images/files/89657020684.pdf
    • https://autoradiator.mn/uploads/ckfinder/files/muziremikatalejewosena.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf6037c6da---68831618797.pdf
    • https://netkat.in/ckfinder/userfiles/files/27536482330.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=download+iron+man+2+game+for+android
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b543.bin
85f7616a1e874512f45de6fe8af07ca6ebbd52cf55728472ebbc370bacfb827f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB543 10640 bytes
font_01_sfnt_off0000cd6d.bin
9bbfee870c6c98ab694248db0fb52ced4397dde4c26c77812e609f04c78e78b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6D 15032 bytes
font_02_sfnt_off0000f36d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF36D 16792 bytes