Malicious PDF — malware analysis report

Static analysis result for SHA-256 70eb9afc544f7ea9…

MALICIOUS

PDF

87.3 KB Created: 2021-09-05 06:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: faed1ef063808fc36d6845f781c0de15 SHA-1: 09d93b83a5594734920d4bcdd6a8069dadbe809f SHA-256: 70eb9afc544f7ea94e7e9c83ef329dc9d5c5ac2a32cb0d7838da3de35a454f31
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nolimitscenter.be/peausitive/images/FCKeditor/file/23131797572.pdf In PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/94cccce5d8baf1003045380431d8fe8c/makovuzuvasaga.pdfIn PDF document text
    • http://softtox.pl/new/userfiles/file/rulizetowofifazowituruje.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/99083326214.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/21536575547.pdfIn PDF document text
    • http://geotersrl.it/file/tolojivusukutu.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/felovivil.pdfIn PDF document text
    • https://koreayokogawa.com/ckfinder/userfiles/files/kisuzijakuxoneke.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/pk9quv4lert2rcdmssmv54uov1/gojulafuwimubavebigisom.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/252151295189.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a14d1528b---78675785315.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/5771411305.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/zexekewolex.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/67684091482.pdfIn PDF document text
    • http://zonwering-belgie.nl/ckfinder/userfiles/files/vewatelek.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/fa523712b9090d5f90cdae36ed865a17/bijovevinoxipasagekur.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/81654106640.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/mascgedcp30fbre8smvh3u8bn0/57007031228.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944c293ad34---9751989603.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/a84f62b98d2cfd14a81d64a23e08e10d/gaxepevefitewotivapu.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/gewitusipegem.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/13170953748.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=fun+brain+facts+pdfPDF 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_off0000ee9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9A 10532 bytes
SHA-256: 21c5ee4a4e7f1a2e73f8d921b3a5fa22eb20c5ce199f84c7a42f2c54eba81aad
font_01_sfnt_off00010676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10676 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E88 18852 bytes
SHA-256: 899135188d42e5fa545f650efd2452f1d645e1d3f0a331a38ce8e192e764fa05

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