Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47eb60a74c4dfe8…

MALICIOUS

PDF

78.5 KB Created: 2021-07-05 04:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4d10e340f81c37c5d4dd343ab3b21c3d SHA-1: a89e4e23cefbbc27c7a785e58f467c7d3d523049 SHA-256: f47eb60a74c4dfe87e3974c76b3a23c57f7060df355e8d487af70286f171a75e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a link farm with numerous external URIs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://garglob.ru/uplcv?utm_term=140+pounds+to+sgd PDF link annotation
    • http://geometrarontani.it/userfiles/files/muxedibowuxojerovud.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/06sp32l7gcvudbn5ip2fr55887/duzetejejo.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/jafukado.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/maditomitixebimokefa.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b033003f756---galuwiju.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/665554567.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1e7fded75---26143811095.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/2i9g73kqk5pdvkglp5rd9djen5/15791847953.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/o2o740kj6d3n7lrcgv4g0di050/sazapubiwefixosukuwoleku.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac33e60fe14---96081205418.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/70c41d5c52b55552a3c783040b7eef4e/palimubexelagegumumolezur.pdfIn PDF document text
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/41548573486.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e2309eb8e9c---zuxutonogebiwe.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/85826829214.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160705a4d64e3a---16091102511.pdfIn PDF document text
    • https://jurad.eu/files/file/97992196322.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/43885575748.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/07jgu9n4i3hcekf1moj3i2csa6/16866648177.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/38341404337.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/letafivemunowugizip.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/9788476928.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a28ab04ab2a---bunotifesifuvadi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/116acfe1c6420251d0ac9cb4d945b943/12891801247.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/12691154916.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_off0000d004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD004 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81B 10288 bytes
SHA-256: a376febb8ca6f2344ff849ba674bed030f3a77694fb8984ad87238de9618ff8f
font_02_sfnt_off0000ff24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF24 17476 bytes
SHA-256: 9a04ed331e1b7fe376c12ffae5b7ddfa4b940ed10b8aab6e23763a5f0e040bfa

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