Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42267ec2cd416e6…

MALICIOUS

PDF

85.3 KB Created: 2021-09-18 18:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 40ed4dc0fc3ba6de9b774ecac74817f6 SHA-1: aaab1e8c9ddc1f8f94c1aec01b854bc2011be22e SHA-256: f42267ec2cd416e62b98c689b1eea480566b9851c56b76d82ffab5169125fb80
172 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a link farm pointing to compromised WordPress uploads and disposable hosting domains, suggesting it is used to distribute further malware or phishing content. The presence of a download button lure reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://crysiq.ru/uplcv?utm_term=camera+an97+apk+download PDF link annotation
    • http://visit-pune.com/userfiles/file/51290239338.pdfIn PDF document text
    • http://go-forum.cn/upload/files/ruvuboxasorenonadojatufab.pdfIn PDF document text
    • https://phr4u.com/files/95291609165.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/10799112698.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613442518ce2e---96154527231.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/6252770398.pdfIn PDF document text
    • http://ducnhua.com/upload/files/9443880641.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/bujukemirumav.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144c7d66f9f7---84116678711.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/sizinijatusot.pdfIn PDF document text
    • https://copacndg.com/images/uploads/files/jasajugofukixifixativi.pdfIn PDF document text
    • http://standdominica.org/files/files/52237161746.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/84584180524.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16140e8e5c8bd5---susoz.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d27c6e3f2e---sinivon.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/lalitobuxizon.pdfIn PDF document text
    • http://bigbulkbags.com/survey/userfiles/files/datemux.pdfIn PDF document text
    • http://app0.linkeo.it/ckfinder/userfiles/files/wegagulitop.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16141dff06223d---60451058702.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wiwuridenokunajupulo.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/47116000470.pdfIn PDF document text
    • http://jeansresource.com/js/ckfinder/userfiles/files/belabozuj.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/dujeduxe.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_off0000e5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBF 10624 bytes
SHA-256: 66c444a9b0c5bd5fadb1fadb5ae470502b1d41df98c8367efbb0f6ed4671ef14
font_02_sfnt_off0001161b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161B 19136 bytes
SHA-256: 622e27094e70ca20f2692ab95a19cac032d56c4c12b3a2871b93ad4852487cab

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