Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02e22c3c2db4433…

MALICIOUS

PDF

71.7 KB Created: 2021-09-10 01:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9e02de1112c73bf7b7c4048120dabb80 SHA-1: 27ed912d3e1990abbb2f22dd5aa0e3a7934f1807 SHA-256: e02e22c3c2db4433cdb18a392573994f58f119e032a13cd38f16514b623d95dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://contrast.no/ckfinder/userfiles/files/lepam.pdf In PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139df2650704---24993318699.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/netozobasirovux.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/gdmlnh0l6o8icikr08v55nvft4/xazokefizerotudebezibadaz.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/0d52de7d410cef047584a00e4d4ae1b4/gaxakid.pdfIn PDF document text
    • http://aallergy.friend-match.com/upload/files/dugopemabosedotalawuj.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/21862681955.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/sigowibiwajegerubasapogi.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/73084504900.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/lenejesewunodinoginimido.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/wugukalebulezo.pdfIn PDF document text
    • http://7m-shop.com/userfiles/file/97720393533.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/7544291480.pdfIn PDF document text
    • http://www.eatvirukai.lt/uploads/files/lejutedoza.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/37386653959.pdfIn PDF document text
    • http://creationart.hu/files/file/42073000487.pdfIn PDF document text
    • http://speak82.com/_UploadFile/Images/file/bewaf.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/xurikojarojevunegenifo.pdfIn PDF document text
    • http://yongqingtech.com/d/files/mibolupiduwadiz.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/lovixitowipufi.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/63187680283.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/26607275055.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=body+bone+parts+namePDF 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_off0000b7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7ED 10720 bytes
SHA-256: 1a0c594eccfaa6fa8e1c28eeece70b755f68ff23c032db27549006ce273a8e4c
font_01_sfnt_off0000d06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87C 15844 bytes
SHA-256: 84bb6a28076502e21599beaab39891d33b3eb90264b9f555add7ad25e843cd9c