Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f84e1b1a7db9797…

MALICIOUS

PDF

83.4 KB Created: 2021-08-17 20:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 48d623f9bafb37ec85f559f6bd0e60c9 SHA-1: f8e6fe7f9e3418002b1f24f8d7e654f7723c751f SHA-256: 6f84e1b1a7db9797409f92fd2d9699e6735d805ad0d730aa4c33445945b265ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure strongly suggest an attempt to lead users to phishing or malware-hosting pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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://irlanc.ru/uplcv?utm_term=pipe+bending+machine+3d+model PDF link annotation
    • http://americanewbie.com/userfiles/file/faxexenomabujazimaw.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b57af9ac4ac---1018910112.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/23525288415.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/9507489234.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a134f3332b9---rixag.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/doxarejaxobixezifogig.pdfIn PDF document text
    • https://menu2uplus.com/images/file/zajorafuzulomatadiges.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/56819853626.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/kajireza.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df96559a8b1---josorigukewupisukivugason.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/822f2e67fccc6e307647ff11a707149a/6467975472.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf8cd3ecca---82211179263.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/jaxejitik.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/2405932556.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/e86c2b133e98ec41dd747da46de5c402/49960854296.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/12995262580.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/larar.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/ecf0b7563ebb425f80bd42ba9da9fb31/95639922025.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2816f49fd1---30981557086.pdfIn PDF document text
    • http://harlit.com/ckfinder/userfiles/files/20210810_211021.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/99771449348.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/gipufujumujukediranok.pdfIn PDF document text
    • http://bscartridge.com/pic/rizatabazanufutemepipaj.pdfIn PDF document text
    • http://santeh.md/img/files/ziribij.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/30e46d40416a4d0b913dbd6d66a4e641/21080419681.pdfIn PDF document text
    • 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_off0000e24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24E 10908 bytes
SHA-256: cec3a095076b1ff750e2ad968aecc40cd83fdb883243e858be6bdffd01b00dbf
font_01_sfnt_off0000fad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD3 16828 bytes
SHA-256: 05359387c2668ecd8781d162b9784e5b3340716dcad06584b9a2f7fcc8c71420
font_02_sfnt_off00012698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12698 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1