Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad2faab65f23220…

MALICIOUS

PDF

83.7 KB Created: 2021-09-02 02:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c1759a74da3e3165840abd7a5a9c513d SHA-1: 8388cd09dffa52885d446f55576227df131e7a75 SHA-256: 9ad2faab65f232208351a63f07cabb3aadf56a24123c9c9d198a96e6a77e41ab
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan distribution purpose. No scripts were extracted, but the structure and URL findings are sufficient to infer malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/e63bdcdbd9f519b6bfeddcea80132eb1/75458296035.pdf In PDF document text
    • https://hirurgija.me//files/8269379672.pdfIn PDF document text
    • https://digireg.gr/upload/wosuso.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/8es3gspjqpd7963ct8jufoklp7/67811683416.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4c6b104f360263fc5cc154620ecdd36d/mezurajida.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/u6gjvotugpcmcnoecseh5vi87d/pifemisopi.pdfIn PDF document text
    • http://graham1978.com/clients/79565/File/pavizufitok.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611abfb8562fa---19975592626.pdfIn PDF document text
    • http://adveotec.com/img/file/lukimubezirure.pdfIn PDF document text
    • http://allycatering.com/userfiles/68815869972.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae3595785a---xuwameturibenemoreravoriw.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/658231233.pdfIn PDF document text
    • https://kraftyz.in/ckfinder/userfiles/files/49398456485.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/c10m70ik3sp3fqf3am1t89uenh/tozoligamukagikopodegatix.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/jebimidupawesux.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ed0992f24---71300812033.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/a42cc457843c83e13bccb01b3283f9bb/42375742999.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/75703175982.pdfIn PDF document text
    • http://kgmda.com/upload/files/vebigufekezatelijenob.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/57073907161.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/9bf57ef29fae54369f9ff53a0c05880e/95363214306.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/surakapiruwedilerepoja.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/jixoxulidipaselumekuled.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=integrated+social+science+class+8+pdf+downloadPDF link annotation
    • 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_off0000e055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE055 17964 bytes
SHA-256: 967d4ebf3732c1af945758dd71d4d151ac498d075680abec0dbd9299c9d42463
font_01_sfnt_off00010e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12650 11040 bytes
SHA-256: cd19f61c12597b4ee7c121a1777ced7d800e9cfdd7597addafd21e8eec4c6dbc