Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed976ce42d02acc6…

MALICIOUS

PDF

77.2 KB Created: 2021-09-13 02:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8107833839befd4991fd1229ea09854e SHA-1: 124e76b8420bad6343cf53703c91811c693f5821 SHA-256: ed976ce42d02acc6f290da1c48c1a48c93cf7633d1a0a3529154b1a4450036cc
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://jsushibrea.com/uploads/files/31774365699.pdf In PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/noruzokekasox.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/77279641015.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161354ed2a4b03---zipibumukefememis.pdfIn PDF document text
    • http://pvvc.cz/files/batopavoseralezowipomena.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/paputewinukubuguziw.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e836ba0f46---4619055787.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/11365277334.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/mesira.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/45169626570.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/xopitema.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/fukupok.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/madesozupepadilemupavad.pdfIn PDF document text
    • http://kencert.vn/uploads/image/files/24226854679.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/23589718872.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021091017142857.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/78969687190.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16138de2292700---vebubemimadawufisu.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/kaviwubolen.pdfIn PDF document text
    • http://abwva.com/uploads/files/bemofigizolepurob.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/xogekuseve.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78453354889.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/gizilofemuvegip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=define+bottom+up+processingPDF 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_off0000c95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95D 10856 bytes
SHA-256: 8546483304f51cb7ea87eecd6dcc7fe857ca614658a173f4b1ecadb2989fb699
font_01_sfnt_off0000e238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE238 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4A 17612 bytes
SHA-256: 565285e2d136f4dab2ac220865e0ab6d3937ae50d7a13d6cb957977150b23cc8