Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a882f3842bdc73e…

MALICIOUS

PDF

95.6 KB Created: 2021-06-30 12:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0a464a0625676795380b84316d6897ad SHA-1: b395bfd7e1a61015c076e282cf59a2330ddd35cc SHA-256: 2a882f3842bdc73e6d2c7315af4adfb382f548dfd8a757c8d65e5c286adfa8c2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, likely serving as a link farm to distribute malicious content or phish users. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this. No scripts were extracted, but the overall structure suggests it acts as a lure to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6258

Heuristics 5

  • 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
  • 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://inwebjor.ru/uplcv?utm_term=ethiopian+government+accounting+system+pdf PDF link annotation
    • http://diencohoanghuy.com/media/ftp/file/fotamimelijibegad.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609e86f6a3d70---jalumufiwenujamubadolema.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/3778b30210e05f196fe5bea93cbc6c4a/3728250264.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/dekulalidujat.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/a7ce9a3cf4d3b7a82c862a17ab013f85/88005092090.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/depofaluwopodezage.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/211144569933.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/rilotebaboxedotarejiriku.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/64451617455.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa593695fd5---jawulodetuvuledifurizi.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/45c2f3150e1763c684f7719894ae4cc2/93646771986.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/98504931402.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe0f8e0a51---vopowasodineletojazel.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/8037f66bfcbe2820f221a173444827e5/99086867127.pdfIn PDF document text
    • https://bkht.vn/userfiles/file/sodudoloka.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/kureromukegozibiroxewaxe.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/u1t2v0i9pipetq1e0bv3llo7mp/zikevapulupeponi.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/25931633067.pdfIn PDF document text
    • https://vijyaiprismcrm.com/userfiles/files/pogokefemajiladexujiru.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/d78ff3c1cc9d1a32d42315bcb60d1b9c/gimisig.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f91d42e48e---24772288142.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/999820036410189afa8cfc3a681344f1/38796141646.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/84362458259.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15695 11284 bytes
SHA-256: d5f880aef29b1c3af153a994677224172b3554d849089c70f3950e2f7475f388

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