Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60058d6150a33d9…

MALICIOUS

PDF

76.2 KB Created: 2021-09-26 04:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4e4806316f5cbe7c248e93f0f84fa917 SHA-1: e8ca88e6014839f9d784aa7defc87028fe944c42 SHA-256: b60058d6150a33d9233e7abe6359ebf9fb97ea381ecd25bb3ccf2064c0930121
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites and other domains, likely intended to redirect users to malicious content or phishing pages. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://krisoc.ru/uplcv?utm_term=my+phone+is+not+installing+apk PDF link annotation
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/7343b4f814a6be3e2925b449ceff6ae7/mojazija.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/vipisewuva.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/94490737997.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/76369157044.pdfIn PDF document text
    • http://hasicimosnov.cz/foto/Image/file/mubizi.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210905094706314281bdkxrbbnt8uz.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/beec2cb6ebe70ac9a7f648408547aac9/movibowodikaxururevorazu.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/77303831842.pdfIn PDF document text
    • http://mfcpavpos.ru/file/16507356978.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/zanedewavesuzaropizej.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16136e1aa3baef---9149634900.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/80227372126.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/77198986836.pdfIn PDF document text
    • https://innotek.vn/uploads/news_file/78181577575.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161464d2e8bc57---13769745148.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/borirati.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/93802983539.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/wuwubanolafexegigixediv.pdfIn PDF document text
    • https://zzhqhi.com/d/files/5293762042.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161459181ec9b0---pijumenemalopewe.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/57933450882.pdfIn PDF document text
    • http://www.skk.com.hk/admin/ckfinder/userfiles/files/lowexilemexowiler.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a8061874f---33513193131.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/rimafazuvezogiwuzikatan.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614f86bfb2ef7---xuropabunuwatab.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_off0000bf6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD785 10632 bytes
SHA-256: e34e4645ca34f7ab457ae77f89de98c442c9f0d790547fc49adac34a83b28291
font_02_sfnt_off0000efce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCE 20108 bytes
SHA-256: ab5634ddf2ab030707241ebafd391b8fb05a424e1ffa1f84666157ab98f896b7

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