Malicious PDF — malware analysis report

Static analysis result for SHA-256 babbec0dfb20bacb…

MALICIOUS

PDF

79.7 KB Created: 2021-09-12 09:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d70ad77c1f01c8730360c994a177ccd SHA-1: 23b7d0fd315d0f2c2203a98b93f41b15b9bfaa7c SHA-256: babbec0dfb20bacb692c77d266a1ebee2111e46994c68b4aa2eec4a911b794c8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics suggest it functions as a password-protected archive lure, directing users to fake sign-in pages hosted on compromised or disposable domains. The presence of multiple PDF links and external URIs points towards a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=onedrive+365+sign+in
    • http://www.jindatunnel.com/up_files/file/buvewupa.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613d28c851279---60117359062.pdf
    • https://campfun.myhost888.com/upload/ckeditor/files/9468581806.pdf
    • http://myphamasia.net/upload/files/bizositalimidu.pdf
    • https://anitt.in/ckfinder/userfiles/files/23313214521.pdf
    • http://vagtteam.com/userfiles/Files/banazodenuma.pdf
    • https://glaze-metalart.com/upload/files/dozozofukituxaderovapar.pdf
    • https://parkettworld.com/upload/files/47718677459.pdf
    • https://rwd.webseo.tw/upload/files/vonemad.pdf
    • http://autoklej.pl/app/webroot/media/files/69471571148.pdf
    • https://greenlakepaint.com/ckfinder/userfiles/files/5931405909.pdf
    • http://phaptangpgvn.net/app/webroot/upload/files/84651555991.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613886a74a7b7---gajokovarasifimusi.pdf
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/34879554350.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c126649bc---76494539953.pdf
    • http://sushiosushi.com/uploads/files/39627027980.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/9c60de0d894b6cec5789f412b7c379f4/wilojufumetotuxa.pdf
    • http://3bbb.fr/ckeditor/upload/files/faromofar.pdf
    • http://gonvvama.net/filespath/files/20210908191305.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b044b01b3d---bafifefuxaremarana.pdf
    • http://seoulsquare.com/userfiles/file/59636601998.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://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_off0000d190.bin
eea1b7f5b1eb80553f4f9532f0ef38720c422031562cb30428248f8a6824bc2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD190 10564 bytes
font_01_sfnt_off0000e9aa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AA 16792 bytes
font_02_sfnt_off000101bc.bin
13f5d97bfb273f9680c56ced8681b855d7df8a6d6d8add0264e329bcabbde4ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101BC 18268 bytes

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