Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5d9b577021e49b…

MALICIOUS

PDF

80.4 KB Created: 2021-09-08 10:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 080f7685482b1257613bf25de464ead9 SHA-1: d68ffea38e4e1c12a653f31590621904c1a8ba64 SHA-256: fb5d9b577021e49b2cbcbfec846e481b3366c366a82d642af77872a3cec646f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, some of which host other malicious PDFs. The presence of external URI heuristics and the ML classification strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823e0e094f7---febotutokanixasewukodofe.pdf In PDF document text
    • https://ezsprinting.com/userfiles/file/33916497332.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/47127533413.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/78293693438.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/88937968920.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f136436e0caa7a4458d68b939326892c/51532179604.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/tomif.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/nemuvosukumujivaxinifevi.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/96551093989.pdfIn PDF document text
    • https://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/c66a75c1c2a830c5123527cb836fc60a/59203675550.pdfIn PDF document text
    • http://4chan.ro/UserFiles/file/44249309776.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f075dab25---26459916568.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/vonivozitorawowadar.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/e35529c0474737a280b845e356aaa914/mifoxufomolisitisazevete.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/694ccf1c06f9941205a473f647621edb/vixovobasasevizaz.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/bigamagar.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/a244ba6426b0be28996b988f31d9d251/gamisujegiwiko.pdfIn PDF document text
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/90717246433.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/bebuvaravafobijeg.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/69085425472.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/55074805594.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/22397626641.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=mirror+image+and+water+image+pdfPDF 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_off0000d986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD986 10708 bytes
SHA-256: a2942174a60d1a1081e6203aca8b00780fd2cf390271509d66ea906040a87884
font_01_sfnt_off0000f1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A08 16368 bytes
SHA-256: 11d581688f52dd079c412123c34f87561fb9f6a040008c461065f15772d7f4c2

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