Malicious PDF — malware analysis report

Static analysis result for SHA-256 0345a09c783637f1…

MALICIOUS

PDF

95.5 KB Created: 2021-09-20 08:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9b86728de68dc1186f4dfda6c7bfe0c9 SHA-1: f69be1e837ab0bd545fe8750accbca456a91edd2 SHA-256: 0345a09c783637f104b216e66dd36f059b18ae682d6a3165859a2a304e82188b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to potentially compromised websites or are part of a link farm designed to distribute traffic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://mtmhomeschool4art.com/mycms/uploadedimages/editorUploadedImages/file/desanevebutejat.pdf In PDF document text
    • http://reicar.dk/userfiles/file/68319423174.pdfIn PDF document text
    • http://xn--80aafkatcapceshpicpg3h.xn--p1ai/pict/file/gepobiripumideremef.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/67851468492.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/nakodi.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/boguzuvobar.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/jifozibijijafuso.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/fogimixi.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/82266405203.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/65534434101.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614381cf89150---pewulomabesifoduz.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/diwuwupokin.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/lixenekibijedoz.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161362f0750fce---pofuxigurego.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/42144426195.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/baxoxavatazunotedomapez.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/65625700059.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0421765e8---dodokiwubikamam.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/15776151845.pdfIn PDF document text
    • http://mayjack.com/upload/files/72644630980.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/zakuvugudifusolakupopur.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/49946987586.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/zelopivudelafibevuzirari.pdfIn PDF document text
    • http://riph.pl/userfiles/file/xipomudojoxetikuke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=kimetsu+no+yaiba+movie+full+downloadPDF 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_off00010c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C60 10912 bytes
SHA-256: e2b79aa5ac1cc9dded2d5f171c16e900d7f2058acbe39460729875a085cd6a63
font_01_sfnt_off000125b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B8 19240 bytes
SHA-256: 8ffc6aa4c95403cdb7992143078bae3c6bc523c97d17e91ad11f788893bfc9ea
font_02_sfnt_off0001580f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1580F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1