Malicious PDF — malware analysis report

Static analysis result for SHA-256 23affd7a1861de86…

MALICIOUS

PDF

69.0 KB Created: 2021-09-01 16:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1823e5be9f1b952acdac6ff7cdf6b248 SHA-1: 51c4e4c99606e18c0bfdf227cf182248593b2e6c SHA-256: 23affd7a1861de86eabfd738ed4897aef7af7020c928bde5364649a329612b16
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites. The primary purpose seems to be directing users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9594

Heuristics 5

  • 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.
  • 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://archism.ru/uplcv?utm_term=plants+grow+from+roots PDF link annotation
    • http://abimobiliare.pl/pliki/File/47727559454.pdfIn PDF document text
    • https://yennenga.org/business_school/uploads/file/11613956590.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/9c77d5e33125bfbe43472addebc742c2/vegeli.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/mitunomosiwetape.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861710355dc---fuvaguvo.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099de058df69---98738740614.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbcc3276b05---roxepewixuzusulokosa.pdfIn PDF document text
    • http://cocoal.com/uploads/file/47454760844.pdfIn PDF document text
    • https://clickbox.ro/images/file/jofibigeregenodo.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/53165384996.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c303b7b9965---62699488509.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a316ee9128c---metone.pdfIn PDF document text
    • http://standardamulet.com/files/files/39307303369.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/97532072154.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///51961377604.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/34412634688.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/xojuf.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/duxemarusulivabolutokolux.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/zotubopemadirimulesutara.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/72060869977.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/pigedebesiwuzumegiva.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/dajokepikegusosixa.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/6d9f04903613c819fbf20cebefaea475/95971824914.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a21db3b09---93150728568.pdfIn PDF document text
    • http://ktcz.eu/files/files/11635750133.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDF 17000 bytes
SHA-256: 22920d57fe5a03c6e2fed20159519c53e33f4c99acc023b098fc43e042558f3e

Open this report in the interactive analyzer, or submit your own file for analysis.