Malicious PDF — malware analysis report

Static analysis result for SHA-256 650eebc5a4b5ed2c…

MALICIOUS

PDF

83.3 KB Created: 2021-09-10 15:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 68d69c7eb6bf12142dd495d74c23603a SHA-1: 14e6bce8866a6006150d189d4c98ba836309fc4f SHA-256: 650eebc5a4b5ed2c27dc294d8887851160958697ddb70ccda5c4a921dcb72346
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised or suspicious URLs hosted on disposable domains, likely to distribute further malware or conduct phishing operations. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353eb3b6e9c---46809294303.pdf In PDF document text
    • https://www.karelo.com/uploads/File/pixekiwugog.pdfIn PDF document text
    • https://zahrek.com/userfiles/file/74231503103.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/8613625156132a1860f6e6.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/mokosulodogelo.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/79606078292.pdfIn PDF document text
    • https://taptigrihnirman.com/singhania/downloads/file/87095132007.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/64817874395.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/99166997029.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/2497995975.pdfIn PDF document text
    • http://mfo-fond.ru/ckeditor/ckfinder/userfiles/Images/files/34769989491.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/resipagubozebifaxuvawu.pdfIn PDF document text
    • https://rozynoklinika.lt/userfiles/file/lesemijurututenezotipap.pdfIn PDF document text
    • https://safe-international.com/userfiles/file/31746996727.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/161385c9ece103---4968797774.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/dajaluxilatax.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132954d2c716---50574163791.pdfIn PDF document text
    • http://happy-land.hu/editor_up/jefekusizotefawe.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/fopabufux.pdfIn PDF document text
    • http://a899.net/userfiles/file/38512863781.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/5860251e7718892cee7b2891c875278d/vikotiwijomidegusavopo.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/23414126120.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/78789913220.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/gifatip.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/fomesajuvajufazugaxuda.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/esjs1d3mqel8ro90qhhi62jsc2/91310813606.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+can+i+make+a+song+my+ringtone+on+my+androidPDF 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_off0000e108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE108 10952 bytes
SHA-256: ec0254834631d8da62027990fcfe7aa8e26a8066c629f15d811692d3bbebbffd
font_01_sfnt_off0000fa3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3D 17284 bytes
SHA-256: 9e4cdde642f613d694d32d03dec54d060c9f5b205623a64097c576a7082dfa55
font_02_sfnt_off0001274f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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