Malicious PDF — malware analysis report

Static analysis result for SHA-256 bceb0798ca693007…

MALICIOUS

PDF

82.9 KB Created: 2021-09-17 03:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b436343752fc5fe65c02f6c78ecb4561 SHA-1: b01fbb9a39e3f761c41a3bf5d6831c1642cbd7e7 SHA-256: bceb0798ca693007c8787f387c7d9008e37ea501228822bdf2c7efa9c0674374
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the overall structure point towards a lure to download or visit malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=download+grand+hotel+mania PDF link annotation
    • https://mentormedya.com/files/sakuwexosidomirixi.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/domoze.pdfIn PDF document text
    • https://ikansambel.com/contents/files/20429022196.pdfIn PDF document text
    • http://npas.ru/pic/file/74779881505.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/nqari3d099r1h2q797ul1hno9j/4794239186.pdfIn PDF document text
    • http://pelejas.com/IMAGENS/CKFINDER/files/93811881316.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/161355e11551c1---lapijavewotivoduzubi.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/58386550906.pdfIn PDF document text
    • http://shangyi-pump.com/uploads/file/030700378535.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/ifjv320cuv1iklfci3mh0a46b4/98639110288.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/fopogijijufesesire.pdfIn PDF document text
    • http://garnizone.com/userfiles/file/63614120427.pdfIn PDF document text
    • http://riviera.az/userfiles/file/29239536291.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/51392962570.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/27322061970.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/bifulokibinamatanutuzaxik.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/xegimewoxe.pdfIn PDF document text
    • http://ccshecea.org/upload/files/54905338224.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613cbc36b25bc---20658344411.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/givize.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/fojopufadus.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143d9a39a70c---xojujumapazumiropemazo.pdfIn PDF document text
    • http://laduses.nl/image/file/82946538764.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea555329f5---fivopupikipifizapojopa.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_off0000d681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD681 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 20776 bytes
SHA-256: f20cb393ee412030f4b044ef4834da9ef3b4a0080c7725a26835607360e639d6
font_02_sfnt_off000125ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125EF 10616 bytes
SHA-256: 050dacc357d3fe476443333b2731cb4d23cbe7f79ae9a24a39b4b406d0ec458f

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