Malicious PDF — malware analysis report

Static analysis result for SHA-256 02aa9ecaa2c5b3b8…

MALICIOUS

PDF

91.3 KB Created: 2021-08-18 14:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 5fcd402bc83811f058e69467ff061b5d SHA-1: 123e1becb8b2e73a303c5ec75520549e5fdbbdd8 SHA-256: 02aa9ecaa2c5b3b8e748fa592f655a8a2286063ea8ea4c08c467d7ef3c6d53d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://coretry.ru/uplcv?utm_term=dolce+gusto+manual+descaling PDF link annotation
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/78eb68ad3676011c2c3bb162916b18ea/lugirijibasupejatama.pdfIn PDF document text
    • http://prograsifkalip.com/files/fisarilifebodazarega.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/63906748788.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/gozadef.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/9888c4fo5n3jsua46lbcc4b567/58705872302.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794768a9ab4---maxozokuzew.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/vajadezowivumawefa.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e18bbd6a1---ligoguvikadoxo.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/7kbn7rn33olii88ntk7dnu9jl5/82665226617.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6200c4018---41757618589.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/84339867604.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/76648438452.pdfIn PDF document text
    • https://samowar.ch/upload/file/44768199986.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2cf95554e---57907517295.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac36d19301---92152432060.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/37986629900.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/wepujiposizuwel.pdfIn PDF document text
    • http://aquatherm-graz.at/files/famufokijogosedemi.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f483b20bdd---19756476046.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8b50b9a6---60894591450.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/38414802649.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/15516001410.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d738913423---kexutemaliturupuzorijozib.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/70jclb4sc1f844l4cuh8dvbbd2/kejakezumiz.pdfIn PDF document text
    • https://actor-conseil.com/files/file/pepanaliwabikel.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FF 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_01_sfnt_off0000fe7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11695 10716 bytes
SHA-256: 2941f8548af4dc02e6b6c08524fd58587992222a40ba247ad7b390478e109277
font_03_sfnt_off00012ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF5 17612 bytes
SHA-256: ec89e0262ba16681cf896a32de7cec9361f8bf3edaf7f3d9ac2deeda9e81ec0e

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