Malicious PDF — malware analysis report

Static analysis result for SHA-256 865529943be40d47…

MALICIOUS

PDF

86.5 KB Created: 2021-09-24 09:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ae9e028f7ea08b399ed27333a07ba5bf SHA-1: 70a27e4fde383a0d01136ed1fa8d7acd854cca69 SHA-256: 865529943be40d47d307258a8537e3dc51b55f39ac21d6367ce734741080eaab
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, indicative of a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the interpretation of this file as a malicious link distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=chinese+civilization+technology PDF link annotation
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/dinolupudizevepakobil.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/59eb95e74c453a8f0eb34d7b12ede862/futevibovilakisiruvitam.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/bevixujofosigumu.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/0ferbupucdgfoqpu9h8rcqgle1/guvobuwanolajixuza.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/bakakenejilumitidud.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/31867747218.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/zitanabilolilasuwura.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/73848986471.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402f852dadc---41264162909.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/64432570485.pdfIn PDF document text
    • https://medbioplast.com/klucharnet/images/file/92370778073.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/muziralejokimos.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/jorabenozolare.pdfIn PDF document text
    • http://mskabel.cz/UserFiles/File/fufitozegixurusorafanixa.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109042255135509.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/40641169321.pdfIn PDF document text
    • http://manhtreminhduc.com/webroot/img/files/29305660131.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/b83246c75fa35d5a47cd40f68ae67eb9/sitosowigifesajokis.pdfIn PDF document text
    • http://ecole.ru/text/images/file/28726582363.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/40016598485.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fca926f059---73356322371.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/81489549545.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/rosesexefobowovul.pdfIn PDF document text
    • http://ahknchem.com/upload/files/donamikegowo.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/71660527979.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_off0000f0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 16784 bytes
SHA-256: 6e6822f3e4858c473c6a80c9a9a700fd9a6f776f5318b385d606411b098c402b
font_01_sfnt_off00011bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC3 10680 bytes
SHA-256: 0039a14d118ad6e397e4ea033660cc99382bca9bebec69a3a88fef1c3354b509
font_02_sfnt_off00013455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13455 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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