Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df7a3b4b6e69842…

MALICIOUS

PDF

75.1 KB Created: 2021-09-17 23:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0514bd621a94d5a35a4dd4ab69311078 SHA-1: 7fb94600dac81fa70e3d5a821635d24d0b3d9bfc SHA-256: 6df7a3b4b6e6984233faa5d3e98ba319896f71afd05c6a0cb418c43da0ce5a6f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://garglob.ru/uplcv?utm_term=english+hot+adventure+movies+list PDF link annotation
    • https://akproauto.net/nbloom/fckuploads/file/87904905109.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/82638047035.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/47ebc448a8ff2cc601a416d887c37dbe/figerogalajuvadokijum.pdfIn PDF document text
    • http://hflchw.com/upload/file/damuvapaxoro.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/88890785751.pdfIn PDF document text
    • http://canadianrockies.info/files/file/dopaganofanepefonibaji.pdfIn PDF document text
    • http://batistar.fr/userfiles/file/90849920353.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376a170cdbd---96642529746.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/fegulimuwin.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/pixidapitigikezid.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/nodiwa.pdfIn PDF document text
    • http://yuhao-tech.com/userfiles/file/juzovatasulob.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/monokukexoxozetarafaba.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/kuzogewel.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/0f3e065fdb16ea132a40a273498e1809/72696442157.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/zojumijen.pdfIn PDF document text
    • http://bookblog.kr/data/file/files/wezilejalasadigikeparib.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/66037185301.pdfIn PDF document text
    • http://queenart.kr/userData/board/file/640907007.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/lepabawirewideximumivam.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56782507526.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/161415bbdb789f---fijiwesajozozusamufu.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/42015116248.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_off0000c112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC112 10844 bytes
SHA-256: 09ca8b69012790fa28a93bb87bdab9201cdbf8163fd8ed5edc6c8502e22ecd60
font_01_sfnt_off0000d9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CC 17404 bytes
SHA-256: d4c00e5debb7ace2f1350c473e5c43c178830b4655681f337836f05142f26e47