Malicious PDF — malware analysis report

Static analysis result for SHA-256 30dd0bd9aeab70b3…

MALICIOUS

PDF

78.3 KB Created: 2021-09-01 11:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2ca6d2df66d538dba5ac48a2125254db SHA-1: 662b27dd49d3764c5f496ea4f9b9474c1611ced9 SHA-256: 30dd0bd9aeab70b377f49e4758cb4c3da28855d8dd19dbf93da68818f19fb114
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing numerous URLs pointing to potentially compromised websites. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. The embedded URLs suggest an attempt to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/44f4fa831d413ea5c10ef2bf5047dfa8/fejalumijunevosa.pdf In PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089702b1cc94---bavidinadutosetabexabube.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/31300545349.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/3479d0e3f94022869f4b782797b01bd7/ligabadasinagozofinaguta.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/ravilazajulagezenopodabat.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/a4ubs5rq4n4buvknncmcukiimo/66931784239.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45fa97378c---xejitazuwaxejukoz.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/1475f90c5654255fc085a79b1399bdfa/651113276.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/14967612842.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/zabugubuverinedugelomitoj.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/4297227689.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/43839794583.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a055be3947a---50792293120.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/3f9ce46121ea55f7e47baacc99105eff/99650866660.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/59977169171.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb9f84e27c---61197508325.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/82129447661.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/46855971900.pdfIn PDF document text
    • http://womenwhorockarkansas.com/clients/4/4c/4cfcdabbb7b8ad81bafe9a4295858145/File/siwugananibuwosipagekil.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///titenunudipatexas.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e303b80dca---91779949714.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/08/files/210813040257.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/75197213372.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=rh+null+blood+colorPDF 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_off0000cfa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA6 10100 bytes
SHA-256: 07a599281554b19e7a0e2e64518a8b3e350598ca08d197eec20fe69223e0e9fa
font_01_sfnt_off0000e5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F5 17472 bytes
SHA-256: 11a128ad049a5168a447094fca4f7c63d896134ef35dd24597debcdd2e3c667e
font_02_sfnt_off0001131a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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