Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03a94a382f15a32…

MALICIOUS

PDF

79.7 KB Created: 2021-07-13 22:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 14c5259d1560709658abdedaed0d3523 SHA-1: 2f7bcfa05731f2af8e48ef396c9d2c657b78a073 SHA-256: d03a94a382f15a326d09f640796517513729c2c602c39afd1989b8b22c8c7a7b
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 compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://boathousebrokerage.com/userfiles/file/57377516022.pdf In PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098cdc8f312b---mulifowajabijij.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845a14018b7---39059268644.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/ib6lfgo3mha1c80t7rt5c6l616/sagamivimajuzudukefuzegi.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/suserusoxopodadotifax.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/7676222900.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb231543e3---80273338577.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160868b54aa6d7---50286293693.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd95a37cb7---lubaxejirabikure.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/nubidigufexafon.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/c26d3d9dd51fd8cae8f43ec10e5f3205/lojameregagimo.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/14250257460da9a8a8b2b5.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/zimigefeleburitadogafawig.pdfIn PDF document text
    • http://rafaelokazakov.com/file/29568205243.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/26290136600.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/74250595241.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/f6dd5d6d66e3d289d5ebc18afcba7af8/jesisegu.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/kikojaduvifu.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/wuwivetugobezapuki.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/b0448ed230e2dfd3f41f88d1d14fdd64/65370963532.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/fudanelesadisaxesapubinu.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b58f15183a0---36572272442.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=common+ion+effect+on+solubility+pogilPDF 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_off0000d08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08C 18176 bytes
SHA-256: 396c0b85a021d67f4620cc506eb193cca6c2e03ae1b311d8f99aadfde8ad9b35
font_01_sfnt_off0000fe8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A2 10948 bytes
SHA-256: 11b7d28413e07e38f22e7f437eabd19efba577c863a47d2982428dfae2c69f4b