Malicious PDF — malware analysis report

Static analysis result for SHA-256 45bea93be66d244b…

MALICIOUS

PDF

90.1 KB Created: 2021-07-30 22:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 73fce0b3a63f69a52821168ddf471034 SHA-1: 721ec33e4452478b511936ddd8bd061ea62d7266 SHA-256: 45bea93be66d244bb3fc15410a1e0462c2386afd2d809c5905ddcd982c987c44
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to numerous external URLs, many of which are hosted on compromised WordPress sites. ClamAV and ML classifiers strongly indicate malicious content, specifically identified as a phishing trojan. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to lure users to malicious sites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://wills.sg/wp-content/plugins/super-forms/uploads/php/files/464cf517393f5244571acc47b87c9495/dezewogojip.pdf In PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c43f20c5c5---67907262308.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/81320684150.pdfIn PDF document text
    • https://flyags.com/editorResources/file///92723651819.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e74c2aa9ce---suvudig.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/8e8b20d14c70e30f6a426db572ff638b/wedivapuranodif.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4996be45bb---37646870495.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3120b7d7fb---19794527151.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f0629c3c3ce---fepezidizurawuturiv.pdfIn PDF document text
    • https://airshow-bg.com/file/jegolomifamimejatimuwoz.pdfIn PDF document text
    • https://senfina.top/uploads/files/210041667.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/387184448.pdfIn PDF document text
    • http://ibiforstarlight.ca/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/35770115056.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/07bf601800d1f27fb065e35d86db1ded/76580285471.pdfIn PDF document text
    • http://opuspointpartners.com/ckfinder/userfiles/files/38769268049.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160f638c348359---6525584694.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/supemezijipitiwu.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/vesek.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e938de1cbdf---suvuvelujol.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ad5b8b572---26658521078.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/51033978464.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/39840074902.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3250680167---puzefumupepul.pdfIn PDF document text
    • http://woorymart.com/userData/board/file/rabarerojutete.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/ea7d3aca783f146a91f55395543b51ed/55877518022.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=vitelity+llc+new+yorkPDF link annotation
    • 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_off0000fc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9C 10156 bytes
SHA-256: c4ae0a416e7f13563da6536f457e198eeee7442d163676883e791650920bd2e2
font_01_sfnt_off0001137b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137B 17660 bytes
SHA-256: c5c9254b74bc2d5e0d57e4583ed8790f01c424a971a9c790708187182a5ee80f
font_02_sfnt_off00014204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14204 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.