Malicious PDF — malware analysis report

Static analysis result for SHA-256 4854ceeffc8bcabe…

MALICIOUS

PDF

84.0 KB Created: 2021-09-13 15:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0c48c6c133146bd1c455a12c0ce07ddc SHA-1: 6e4f5a99c3bb7161462b7ce40ee21c1435c311ff SHA-256: 4854ceeffc8bcabef7fc3ac99a33ff9c5767b1d351c0cbdde045d3f153974023
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external domains, many hosted on compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate an attempt to direct users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=download+game+ppsspp+ios PDF link annotation
    • http://autoachtercamper.nl/userfiles/file/57403103232.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b43d0709f---xoxipajitakidugezezipe.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffc26a4aee---43304975906.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/59896988254.pdfIn PDF document text
    • https://ausztriasi.spawellness.hu/upload/hirlevel/files/vesizujisatujagope.pdfIn PDF document text
    • https://cncunse.com/d/files/14890428314.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/vifezufugimodadewemat.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/fofitowojiwojevon.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16132aec2b0ccb---sopidutefezarulujedawulil.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/65624734929.pdfIn PDF document text
    • http://kiajihlava.cz/UserFiles/File/25449392752.pdfIn PDF document text
    • https://masihpt1.com/contents/files/suxowazabezuma.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109061632228612.pdfIn PDF document text
    • https://flomogroup.com/upload/files/91824519474.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5adf25e51---jiluzogow.pdfIn PDF document text
    • http://ledlight-lamp.com/mingyi/images/userfiles/file/vepuzulojuwi.pdfIn PDF document text
    • http://floramarble.com/uploads/xijivawili.pdfIn PDF document text
    • http://ristoranteyuri2.com/userfiles/file/18341542197.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/8772723875.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc50695940---puratajosasovi.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/mitogasale.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/5glcao3a2uuop4769t825nrkk7/setuzixavewumilex.pdfIn PDF document text
    • https://rais.bg/uploads/file/89219042031.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/nawonesekokijuf.pdfIn PDF document text
    • http://hzqzg.com/d/files/97666219707.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_off0000e585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE585 17488 bytes
SHA-256: 599756501643e0ed7b4942927f3a00e3fdf9617d5bbf2918b726a72b646d5aef
font_01_sfnt_off000112a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB8 10624 bytes
SHA-256: fc9d579dd8fa1c0acdbe98af3b6482e3ac809eabaf65130f13ffd46fe1d6b1d8

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