Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b5dba149e0020e…

MALICIOUS

PDF

89.5 KB Created: 2021-08-15 00:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: f747ab946499bfce54816d49777fadf2 SHA-1: 10ccc2e34702dcb7ce64cb788a69677c6cf068af SHA-256: 80b5dba149e0020ef3984de65c2dcc5554b1ea5d7eedace05111bebba5d9fbc8
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous domains, many of which appear to be compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://bulgankhangai.mn/userfiles/files/10996804450.pdf In PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/55622d634274570a71b8b969bf99736d/vetasujimujodixeduza.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///gutox.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/xaguwotela.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/d6e8520a96c9a65e3f523f07ac63fa0d/lojawufedunatuxetomuwi.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/0jtludqv7g1nb7918mgi6bq06d/goraxopeboguv.pdfIn PDF document text
    • http://ruihuitax.com/files/file/jasakiwunivuvu.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f416a94e64---duvatekupidamukawo.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/a44677e810cc09129e1a8a004b6aa3b7/zutigesorobowuvi.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d09aeab090---jadatof.pdfIn PDF document text
    • http://naucseto.cz/storage/29604854376.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/fb0a0282acbdc6efb4253ce1c8820b6e/67927150970.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/bidopijivawanubedonegi.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/43806955600.pdfIn PDF document text
    • http://m4krichmond.org/clients/3/3b/3bf4c986be49c21931b3574e72fd8103/File/bakodaroredeve.pdfIn PDF document text
    • https://milorem-service.ru/userfiles/file/nolegufuzowepifiwaresuke.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-07-30/images/files/98889367322.pdfIn PDF document text
    • https://mundolibre.cl/uploads/userfiles/files/balesenowuvisopaxini.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/35481647505.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16094032fe810d---63753401883.pdfIn PDF document text
    • http://minhanh.com/files/94383762154.pdfIn PDF document text
    • http://giaoducvietnamtv.com/images/ckeditor/files/980484269.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/625jt956fsivmei7eramaui057/xoxisexejod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=summer+time+saga+2020+download+iosPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000e0ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE0AB 16716 bytes
SHA-256: e08e91945b70fe7f45f07e805eba86c21d31fc9f309927c9dc33a931622272d6
font_01_sfnt_off0000f888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF888 11092 bytes
SHA-256: a850a4592c98b6a7167afc3a2467402806ca2a6b0d404d840c7b9179a54b6e67
font_02_sfnt_off0001124b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5D 17052 bytes
SHA-256: 61c878598c11b4159fdee2e50417f5d30ef8f1f2a1652afb66ed456eacc53412

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