Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64472961007d47a…

MALICIOUS

PDF

75.9 KB Created: 2021-09-09 01:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1a1b7fbf3c49b211e848931e20be24c4 SHA-1: 3ed663f5912a612aadafa9c8842557330d551d24 SHA-256: f64472961007d47aaf17caa3c5e0f8ebfe8c43b82f2ac74f820307131c67c519
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to domains associated with link farms and potentially compromised content management systems. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be part of a multi-stage attack, where the PDF itself provides instructions or a password to access a malicious archive. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=sony+theme+apk PDF link annotation
    • http://yas-center.ru/userfiles/file/nalelikivom.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/fezojoke.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/bufokojujizagaxonaxa.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/030137183383.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/fotibamisusotazegaz.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/69948434287.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16136a63735f1e---vibupuderarowedel.pdfIn PDF document text
    • https://junona.manyel.website/images/uploads/medium/12185501930.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/3999432787.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392c1b862fe---6608167047.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613933ee2b5cc---434197963.pdfIn PDF document text
    • https://purefeeling8.com/data/file/53016548400.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/97818118431.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/35723031822.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210906231216.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/96257629630.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/pofojuwomenesi.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210901_912186BDDE2FCD26.pdfIn PDF document text
    • http://identik.hu/editor_up/kuvubaridakapidosu.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e8fb5b60b---fufamikifefupusilamabano.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28084750423.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/42504375101.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210909_1222CB197645F8B5.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/sososigux.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/rexevijenibo.pdfIn PDF document text
    • http://keitbg.com/images/files/lukefala.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_off0000c518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC518 10392 bytes
SHA-256: 58cb41ef85371698ce9f03c0badb20dde5e502ef1eeca54329599c4911282d8d
font_01_sfnt_off0000dc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7E 17616 bytes
SHA-256: da9efc1e948efc5042793002743fda212f93c23746762aa07ef31e03a0993b2c
font_02_sfnt_off000109fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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