Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ae0234ff29f4ee…

MALICIOUS

PDF

89.3 KB Created: 2021-09-14 06:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e50219fc8826e2172c30ab3d719c5f32 SHA-1: c252ea1d003b44dfb219e30eac1897366841863d SHA-256: e2ae0234ff29f4ee2efda9d7093617df134eb45e80cf2ac6db9954418b1e4cdb
164 Risk Score

Malware Insights

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

The sample contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users to malicious sites. Heuristics indicate the PDF acts as a link farm, with many URLs pointing to potentially compromised WordPress sites or disposable hosting, suggesting a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of a client vulnerability to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 http://cycling-software.com/files/file/79913945326.pdf In PDF document text
    • http://faisaltowel.com/survey/userfiles/files/towiwew.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16134119f6d96f---58277472518.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/79878463815.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/57132965551.pdfIn PDF document text
    • http://ormansagszive.hu/upload/file/jusabagup.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613878a5bd801---79247379450.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161324c451d693---wujiweza.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/fizupadaxukisoteto.pdfIn PDF document text
    • http://tranindo.com/Uploads/userfiles/files/moxiguke.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ead17d21e8---vujupaberegabujiw.pdfIn PDF document text
    • http://budaors.varosom.hu/userfiles/files/diribudit.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/59442394653.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4e2603107---69857817783.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/tirujozisusuzokopogupo.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/dakipojilixezezebud.pdfIn PDF document text
    • https://projektovanje.info/userfiles/file/13371207752.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/pv88uoq3jgtavdlv586otff4q5/36119838670.pdfIn PDF document text
    • https://rheinfurth.de/userfiles/file/35079098940.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613979845295a---84656599947.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/nasabelof.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/96966640981.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=android+sqlite+datePDF 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_off0000f2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B7 10368 bytes
SHA-256: 2c283ddf4576b9f9f18ed6d02d5626bef2ca7574388c5ed9d4aee2652d89130a
font_01_sfnt_off00010a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A09 21064 bytes
SHA-256: 2ac17d83948b084da94d078e45f75215d1e688c4f2866809f9d850a1e7f85375
font_02_sfnt_off00013fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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