Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee45bda0a31c30c8…

MALICIOUS

PDF

85.1 KB Created: 2021-09-21 04:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a43cea135ecefe118e0c9334cdd74663 SHA-1: 74c06b2b5f3c4541d93ee680fe2766a8cdb6cde3 SHA-256: ee45bda0a31c30c8d157a52505556723ef262e317bb71376d677bd4ac881e81d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are part of a link farm hosted on disposable or compromised domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous distinct hosts with a single link each, often with UTM parameters, suggesting an attempt to obscure the final destination or engage in SEO manipulation for malicious purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://infrive.ru/uplcv?utm_term=clash+of+clans+code PDF link annotation
    • https://activsport.ro/userfiles/file/25047072275.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/xujafokezi.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614484fc57b4f---bogat.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/be72558be5bb0cdb65f2a63f31d89b77/zojure.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/21978837207.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210918215901.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/lujuxavopanitekugojeno.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/gogen.pdfIn PDF document text
    • http://nerezove-kuchyne.cz/UserFiles/File/83777578611.pdfIn PDF document text
    • https://vyrukrc.lt/userfiles/file/kexakeja.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/70493182366.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///59272572279.pdfIn PDF document text
    • http://guide-eq.com/userfiles/file/20210912012507_d84i75.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210910_201145.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/89584764807.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/sesiresewesupagololexufu.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/binodemobes.pdfIn PDF document text
    • https://kuepancong.com/contents/files/43557463451.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143456377a9d---mazax.pdfIn PDF document text
    • http://vinacafe-dalat.com/Images_upload/files/75205261271.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/wilokimipixunujivikili.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/wufagimuxadanukumok.pdfIn PDF document text
    • http://efcosmetic.com/uploadfile/files/99299849960.pdfIn PDF document text
    • http://www.hkimm.hk/_bin/ckfinder/userfiles/files/wuluxeme.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_off0000e51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51B 10312 bytes
SHA-256: 67739c4610d77875f976ef6f8cc595b5ff63afc76afb36e7b34fe9faf210c75e
font_01_sfnt_off0000fc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11466 19592 bytes
SHA-256: 3b49b9d6278f5a5f5976ea805423f234a03cb056945508324f3f5512f29b20ee

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