Malicious PDF — malware analysis report

Static analysis result for SHA-256 1077ea1ea7940270…

MALICIOUS

PDF

79.8 KB Created: 2021-09-02 01:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b1f869cff1164189e7bbaf951ced456c SHA-1: f51ff1b2c645ccac01dd732dc5e2d02ce19d973b SHA-256: 1077ea1ea79402700b11a0719c304c9ba0426e29ff1a31a3c29972d1492b6f5b
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised websites or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit vulnerabilities. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://boathousebrokerage.com/userfiles/file/78729774332.pdf In PDF document text
    • https://strongpointmarketing.net/userfiles/file/kurod.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/tarolisodibilasib.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/7379696941.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/dfb23e391ddec2eb0e371a0d469d906e/70853737086.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/575411951.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ff492e585---40506653144.pdfIn PDF document text
    • http://dzbnf.com/upload/file///piveruzavebefif.pdfIn PDF document text
    • http://pasted-radio.de/web/files/vemotunememoxarux.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/xugarivonoritamironoken.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/69457091674.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/vupajetafedojuf.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/sibober.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/83668880635.pdfIn PDF document text
    • https://coluer.ir/documents/file/wanipitada.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/9060583356.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608099693c741---budusebolisifotigasaloz.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///24312952630.pdfIn PDF document text
    • http://odumakus.com/uploads/files/xufone.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b6044b8f2c7---bimemawemurikatu.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/40296265432.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=fifa+offline+games+download+for+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_off0000d29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 10664 bytes
SHA-256: a9daeb87fe890bb7a37d8501357bded03e9146cd192e7f9b0620df0729204dde
font_02_sfnt_off000102e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E1 17432 bytes
SHA-256: 124082dbee844611bde0ca22c4fb630a61329f2405dc11054feb2c41d8ca94b5

Open this report in the interactive analyzer, or submit your own file for analysis.