Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f593c75c152314…

MALICIOUS

PDF

68.5 KB Created: 2021-10-02 20:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 78799ffce0fa2fa8b34bb7843f5e5ff4 SHA-1: ca61f1e09a2f272dfb0807d31feaeacaa1e73436 SHA-256: d2f593c75c152314cfb58ca2cd24ef4928029c0eaf212c2557334c3e328cf560
164 Risk Score

Malware Insights

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

The sample is a PDF file containing embedded JavaScript, which is a common technique for exploiting vulnerabilities and delivering malicious payloads. Heuristics indicate the presence of external URIs and link farms pointing to potentially compromised domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.hippocratio.gr/ckfinder/userfiles/files/27028131705.pdf In PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/44394555018.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/taxoboze.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/saboneki.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/40749244971.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/taneb.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/gotowiwokoduruwil.pdfIn PDF document text
    • https://gameadvisers.com/js/new/fckeditor/userfiles/file/rujufikipilisofalek.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/18697967811.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/17484329685.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/fomisobubomuvivodaseve.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/d3e64c3a08b5c1192abc82c136bc15a9/kajolupelunutowog.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/25557888173.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/2594815044.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/ad8d242a8291800cfccf383271353027/wowemasiwavibuwir.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/47721803946.pdfIn PDF document text
    • http://ty6600.com/userfiles/file/jejebupinedosulusevaxa.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/29297414861.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161461c0d5b4a0---11209388863.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20211002201823_admgv4.pdfIn PDF document text
    • http://goldway.jp/upload/board/file/3153340016.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/10339023096.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/nilawepedop.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/netexesusazodifazepuki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=unmerge+cell+excelPDF 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_off0000b1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B1 14516 bytes
SHA-256: b706f2a21a7625066b090515de2225620430ab96e970edb7851b6a0f015f4354
font_01_sfnt_off0000d619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD619 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE30 10040 bytes
SHA-256: bc6873445bffb380aaf1df686004e1d58cd93e6971f23d4bcab523ea881682a9

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