Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb448f55518f704c…

MALICIOUS

PDF

72.2 KB Created: 2021-09-01 10:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: a75fb4916bae0582fb08c092c41d6aec SHA-1: 271a3cf83d4a2983c430fdb16292f1768dec681b SHA-256: fb448f55518f704c3029bcb80f343655f76e1f2f17e39df859a20c87740dc257
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and disposable domains, suggesting an attempt to direct users to phishing or malware distribution sites. The presence of these links and the overall structure strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://dycmc.com/DATA/upload/files/202108161258521167.pdf In PDF document text
    • http://openendrep.com/userfiles/files/62981806198.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/voxanugatuzarusoku.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160714f6b3ca62---mewaninojowosuwam.pdfIn PDF document text
    • https://ilmercatinosottocasa.com/file/xidojexigagonumevurud.pdfIn PDF document text
    • http://hkacca.com/userfiles/31040306632.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/medelisef.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16104739b5351a---lulufujemosovub.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/feputemotenusosusosubipiw.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ae3d7e1a4a---dilotoxuzazipifididowaf.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/wizivetop.pdfIn PDF document text
    • http://hongdacable.com/d/files/gejajegokozapanob.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/jabufuxofobosulexibuwin.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/mudeseze.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/jiwowaru.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607598024a7c0---vonur.pdfIn PDF document text
    • http://starrsgazette.com/admin/images/file/15953247601.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/75068546727.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/84992389117.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160da594804832---25909459559.pdfIn PDF document text
    • http://uzks.hr/upload/datoteke/sulutofipavagi.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24cdaaafa1---65412828890.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/7f04a7a602fe26b45b63defd4ab2710c/wupopu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=green+fire+hydrantPDF 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_off0000b65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65C 10268 bytes
SHA-256: da22e24aaa5a436973ac4dd00ca46e3a00713112c1078d4c50c5326858335daa
font_01_sfnt_off0000cd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57C 17768 bytes
SHA-256: 6264e0ea0f39115731e93f4b04814e7122735e1ce3b4194c5b76cd1ab56693d0

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