Malicious PDF — malware analysis report

Static analysis result for SHA-256 380658ed9901f84d…

MALICIOUS

PDF

74.8 KB Created: 2021-09-16 07:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4409b0ac926cfcf704f3224d0113fde7 SHA-1: 32783e019fc74b556081a5fd1b867865883f734f SHA-256: 380658ed9901f84d49f1312a318a16481b1a69fc5d5616387d431fcf66a1ad98
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to external sites, some hosted on compromised CMS platforms. The presence of embedded URLs and the nature of the heuristics suggest an attempt to lure users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pistant.ru/uplcv?utm_term=maleficent+full+movie+eng+sub PDF link annotation
    • https://pomtco.com/technical/files/file/ketamurubojopakafugawelo.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/08/files/210831221227.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/wuvasejinawasok.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/dizupa.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/55268275715.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/wufagazafumogexiravas.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136306ac4772---perewemusajixobeweke.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/zipugik.pdfIn PDF document text
    • http://miass.realxenon.ru/uploads/files/77019419049.pdfIn PDF document text
    • http://ficfart.org/userfiles/file/77196418752.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/diguwoxozawob.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/96153799810.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/sopotedavawixepuweruwu.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161391507df5dd---mowojavute.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021090613225073499.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/26967264600.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/1mqfanvq5t4sdhk5nda1uqcbhk/kubajowi.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ae57b7a62---tekidukakoloxikidafonozun.pdfIn PDF document text
    • https://afritransport.com/app/webroot/files/file/11648441715.pdfIn PDF document text
    • https://ekransamara.ru/files/dekivugazifavov.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/62819917871.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/kirazipenede.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/dixovo.pdfIn PDF document text
    • https://tessuno.com/upload/files/6132389dcbe02.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/91491105921.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_off0000bc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC74 10880 bytes
SHA-256: 6890a4951a65174b18d3f5ae91f5bdc4970994987665ebbc7aa4a9c463cbf11c
font_01_sfnt_off0000d5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A9 18328 bytes
SHA-256: 075676d252a34bd66cc24821266086dcb84ab94d0270d370e157efdfe2c219d2
font_02_sfnt_off0001056b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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