Malicious PDF — malware analysis report

Static analysis result for SHA-256 82abeba58fa13e64…

MALICIOUS

PDF

140.5 KB Created: 2021-06-26 02:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 88e53e04725c0b3770181da4553bfcf4 SHA-1: 8f443f35c0af08ce204eb5dd8d8db9bd15c02236 SHA-256: 82abeba58fa13e64943e1812148ebff29c410e80640be36f5c210e938f88b87b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/uplcv?utm_term=download+need+for+speed+most+wanted+full+crack PDF link annotation
    • http://fashioneducation.ru/userfiles/file/tewixumodu.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075d93059d3a---wiser.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210620065947_o4ylhm.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/667957baf1487f14ca51672e96d119d7/zagukef.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16084d54d7f662---zakudajugudatojuwudanofe.pdfIn PDF document text
    • http://elskenecologie.nl/files/teputuwefax.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9b0982e28---sevovozekaki.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/54417678598.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/j585p2cts76tv0tqd9qje3uu2f/19645460492.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16096793788387---lobelazowelipevapefisanon.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/likomabasipokodewir.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/dfbd3824a0f227c4088b4b0143064113/pisovatotolovaxase.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/42868413732.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608907fb4b380---gusawukun.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083cdfd6f464---mubadurirotilebur.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984c60983c9---18773754611.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/a6ceba26264d1d1073ef0907599b99a8/povugoxozarewan.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/4f0aa8c7d0b647a83b2ab5d5809a2736/revilixaka.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070f15879c50---38229729252.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/vaxefomewixibobipunuz.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/xowewazojodosimutesan.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/cb43c1a6e1a86f88bcf01012e529ac66/joxobuzovozexix.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/rh626at6d1l8f56an7o7fg9haa/70624224413.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/ad32911fd40ce9c814139a12033ad8f6/kakawurumivo.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_off0001bd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001d5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5A4 19476 bytes
SHA-256: 4081e81bcb85eee30c63da6182a8d3829ef09ed934d99b618be26f5664f2df5f
font_02_sfnt_off00020896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20896 10968 bytes
SHA-256: e18966431168831ccddff86a75acc4a2404062a53fa5996d6ab07907609dab79

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