Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f942962bb2fa0a…

MALICIOUS

PDF

82.5 KB Created: 2021-09-01 07:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7e137178d837345ecbae45d65dd8793e SHA-1: 62630182e718430ed78f2597ec7db5c9a2f74f6b SHA-256: b2f942962bb2fa0a24ae301e0c0458b9e8ca1ac38e94acb97d9b44a5383e41a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The document contains numerous embedded URLs pointing to various compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://smidgel.ru/uplcv?utm_term=that%27s+what%27s+up+lennon+and+maisy PDF link annotation
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160815c88ac2db---dorasimep.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-4-29/20210429180703276318.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/vafowakiwizukokenura.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/zixusidesugezovazob.pdfIn PDF document text
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/dizalatitag.pdfIn PDF document text
    • https://wsbtitan.com/images/file/70632654812.pdfIn PDF document text
    • http://chamdure.com/DATA/files/19417832394.pdfIn PDF document text
    • https://everestart.com/images/stories/file/37439394199.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/6aaddf0ebf8b2467a96c8002d07db690/98436635838.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/68026798060.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/ud6cvo04krggcpptl4mopran40/tivajofulivek.pdfIn PDF document text
    • http://hghs61.com/clients/9/98/9814c5f28b4e93efd1f74733a9fd6b0f/File/77704835399.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/17423969871.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/2374797524.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d36db24feb---lanowumelujovajorutamit.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/42596990842.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/vitiputi.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/filenerilotebi.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72003c31fc---kadofamazanodibiwevas.pdfIn PDF document text
    • http://oris-am.com/editor_up/34502283497.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/eaa08a1b995f2a8ff39ba5f0e39082f5/jawonuxolifap.pdfIn PDF document text
    • http://pasaru.com/upload/files/gaveluga.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_off0000d9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FC 10852 bytes
SHA-256: 06a931d0a3c63b8a783c0d379ca92aeded312cf6492c8dbc8638483dc3e3e39a
font_01_sfnt_off0000f2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0F 18832 bytes
SHA-256: 520429db27a3ff7bf0732397aec2dfe48dd0c7c777a569aee7953557700cc8bb

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