Malicious PDF — malware analysis report

Static analysis result for SHA-256 701158034dbd6325…

MALICIOUS

PDF

75.5 KB Created: 2021-09-13 07:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 828b6a203e6c2dde8f626e32d2264c42 SHA-1: 36d7466c1afa13758c876955f18db55780917a7f SHA-256: 701158034dbd6325f79694bc1ae5c246843728f9b5f1cad9a5682eae7ec421b0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised websites and potentially disposable hosting. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://irlanc.ru/uplcv?utm_term=clash+of+clans+hack+apk+download+latest+version PDF link annotation
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c24301e839---97041189351.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/64184799776.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/39429278985.pdfIn PDF document text
    • http://zhuoxinlaw.com/userfiles/file/20210910234958_640922138.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/gikavafuririli.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/34796096556.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/8d4e5750be099cc4df20c511f632f98b/gugafi.pdfIn PDF document text
    • http://hide-bo.com/img/tmp/file/nolubevowolulepej.pdfIn PDF document text
    • https://clubon.top/uploads/files/72428112130.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/42767178138.pdfIn PDF document text
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/88026226469.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/cfb4d4bdf38d0ac55008b17d7b5eadfd/turemu.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/memamuke.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b774f1fe87---kupizesebali.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/givoxosako.pdfIn PDF document text
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/88608853167.pdfIn PDF document text
    • https://usgcambodia.com/userfiles/file/89681667233.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/fedagozav.pdfIn PDF document text
    • http://yourhandmadeitems.com/userfiles/file/lilosefemuvitaja.pdfIn PDF document text
    • https://demo-calson.garment-pro.com/ckfinder/userfiles/files/letinu.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/vuvoduziz.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vimuxudunuvetizinopurunet.pdfIn PDF document text
    • http://393citizen.com/upload/files/46077528460.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/86280456719.pdfIn PDF document text
    • https://dm288.com/slicice/file/76442404285.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///62091051450.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_off0000c5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DF 15932 bytes
SHA-256: 721713512eb573c1cb3ebd7b0a95ef31a952f8984218074d8a0f745b4ed3b48d
font_01_sfnt_off0000ee84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001069b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069B 10992 bytes
SHA-256: e0447b90814215b38b60a5207a5122e844c8a9b8097902d44f043279e0525be6

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