Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f711d6b58d60c7…

MALICIOUS

PDF

80.6 KB Created: 2021-09-01 09:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c650b333ea64ac7367990f8620277230 SHA-1: d87edec8f55204226f6532303a04447822ce743b SHA-256: 02f711d6b58d60c772f1386ee9a9cb924234b2f0edb071534c96aa594993123a
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://infrive.ru/uplcv?utm_term=pokemon+master+quest+gba+download PDF link annotation
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/5a8b36442d581c3e58ba449a681006a1/60151095715.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ead0e727a---13866577379.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05f676a677---25274987143.pdfIn PDF document text
    • https://onecre.com/images/content/files/41762681545.pdfIn PDF document text
    • http://kukubara.com/zdjecia/file/52578414839.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5b5880801---77576928866.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/c96a23c1bb77555c14b494090bf3f777/85521504771.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/cec759cdf18d9ec341048339c97cc3ae/pabobirepefumutor.pdfIn PDF document text
    • http://thetachikappasigmaalumni.org/clients/5/56/56ac51e2ee760b54d3ff8b7d53c877b7/File/21786371746.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/2108310646351716603tntef.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/97801568736.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/77q27naulr2a167q6hmem1s0sl/99744845456.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a580116ab79---titekinogozujukavem.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/94160179526.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3115e8571---kametagolokovo.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073eadba7e30---zalejifub.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/4b537c8c505c28181ddb9ff81671c59e/86062355961.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/miwuniwomox.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/6675702523.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2668635ae---senug.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/jefozizivo.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/28590440434.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/30801287937.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_off0000d331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD331 11064 bytes
SHA-256: dade74972da1082f0531a27c178d5aff78b0bcdde8d6dcd9f8a1a3b09a630271
font_01_sfnt_off0000ec8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8F 18208 bytes
SHA-256: d12e102e2227363c4c62f56431353273f1c6b0be9534b05490272385c4c8f223
font_02_sfnt_off00011c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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