Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e045ee89d94ce5c…

MALICIOUS

PDF

87.0 KB Created: 2021-09-14 05:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 67ba47926ef153aaa8165f19d748fe85 SHA-1: cc456273654b2615d5fab16f0a3ab73e89c6fe44 SHA-256: 5e045ee89d94ce5c13eade8eff5ef480b8687cd6c4cd95eef0d799a43d2be59e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of these links suggests the document is intended to redirect users to malicious sites for further exploitation.

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 https://oniceh.ru/uplcv?utm_term=best+online+multiplayer+games+for+android+and+ios PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1fbbdde55---35231703548.pdfIn PDF document text
    • https://5udua.com/contents/files/wogizugilatoxar.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/rolukefefewu.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612eedb9797a6---17325908556.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16135ac6f2011c---48596108029.pdfIn PDF document text
    • http://autokolcsonzoszolnok.hu/admin/fck_upload/file/nixunulebojitemez.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/49947327063.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/1972023947.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43708222758.pdfIn PDF document text
    • http://cnzgks.com/userfiles/file///dowomikugiruwutos.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/lelifukemek.pdfIn PDF document text
    • http://lulanjina.net/upload/files/43147979648.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/gewibosarivuzatewes.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/18845336415.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/karizevobi.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/31853010555.pdfIn PDF document text
    • http://yildizteknikelektrik.net/resimler/files/tibafubivij.pdfIn PDF document text
    • http://dienlanhhuubinh.com/upload/files/58314718309.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/napazosu.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/43038979547.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f22dc95d16---28540412962.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/11718463871.pdfIn PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/figubudo.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_off0000ee90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A2 17408 bytes
SHA-256: 1fa5deb5e83e24e7c69c615a7de0089f095271c1441c9db9b74a2d5749f2b013
font_02_sfnt_off000133f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F5 11108 bytes
SHA-256: 26dff7612567a23c3ba94028f056449a0b36a7aad5198207c388b06dbbf014d2

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