Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0dadaa8cf4decd5…

MALICIOUS

PDF

75.6 KB Created: 2021-09-02 13:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7b9259951c6b1b3438efba5eca436f76 SHA-1: dd0e6a3281c20ceee84864fd473fd76f5a9dae34 SHA-256: d0dadaa8cf4decd544d1cee1e21f3110073dd356ce127113ff03f42746ccf0d4
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads and disposable domains. The document body is unreadable, but the presence of numerous links suggests a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://architettoletiziamasciotta.eu/userfiles/files/pabizumivinokekeja.pdf In PDF document text
    • http://bestbelly.org/content/files/files/makavajusivefevewuregu.pdfIn PDF document text
    • https://fetogram.ir/images/upload/files/bebikonaseruluwujafufugoj.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/84983929741.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/55421184789.pdfIn PDF document text
    • https://micsys.in/userfiles/file/zurufaxaku.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160abe33be46ec---95759824877.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/70686518205.pdfIn PDF document text
    • http://amandamaitland.com/images/file/vataralu.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/19939832658.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607df48f5db5d---21588166280.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/kifoxigi.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/bogigenevadabirodox.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d23d0a2f9---guwurulororu.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ea57e019e67855fa3227837637165b55/2157688169.pdfIn PDF document text
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/307945e14fd5381942ad948e457b91e6/jaxuforane.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d7e91b7d7---pamefujeve.pdfIn PDF document text
    • https://limadelimon.com/images/file/98154877536.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/pebep.pdfIn PDF document text
    • http://thecreditcrisis.net/clients/73966/File/52100733273.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4a424cfd8---tumubonunuvajexizop.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/jomobolarimojemejewikoso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=pathology+review+book+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/2644d23e5138b2968a9fdd961cf4dcf4/65463006885.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_off0000c312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC312 11004 bytes
SHA-256: 90dad2b0175d8b0bdcfac763f536fa0e200996758c8f5b3be8a889433c641a8a
font_01_sfnt_off0000dc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF483 17200 bytes
SHA-256: 5057faf57387a4496e7d031538e2a2443260823612f43bc4a6cdc6df5b7ff9df