Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f20ac2905f280f4…

MALICIOUS

PDF

73.4 KB Created: 2021-09-14 06:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7bfa2cce4cfdf9168823c094d7987b33 SHA-1: bf8f9cafe2e42a24f70b670347291a73d5b1cb5e SHA-256: 6f20ac2905f280f4c0e5ffc8437f63269a1600f6a23aca2e2258acd9df93bd41
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting sites. The embedded URLs suggest an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4676

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://livstyle.ro/home/livstyle/public_html/uploads/files/geduzibazor.pdf In PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb0e954269---52051533307.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/65665941543.pdfIn PDF document text
    • http://tele-klass.ru/i/upload/files/xerurofavadujag.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/bodulasum.pdfIn PDF document text
    • http://noithatphathuy.com/Images_upload/files/13444445164.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/xoxonamijofifur.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/83785935662.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9d5407bec---gutotiroxomuxop.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/4617018239.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/97224164372.pdfIn PDF document text
    • https://nordiskvillaventilation.dk/userfiles/file/6624892608.pdfIn PDF document text
    • http://mp-journal.com/media/file/55596636740.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/11493604026.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d63f1ae91f---puwelifawogawatav.pdfIn PDF document text
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/jijedijusoraxibamatobu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366284c39b6---nesivimulesenosodaburidek.pdfIn PDF document text
    • https://hotlinepro.in/admin/userfiles/file/61222736276.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/50616368761.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/filowe.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/getebudegivuzevomar.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/26761056947.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/wolixofudusabedulap.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1612f08f8aecbb---73791021227.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=amazon+rainforest+floor+animalsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42C 10416 bytes
SHA-256: efe0aa3cad924b9e61dfbd1430b2378fd1c24dae3878755b8f871b0e75e8528d
font_01_sfnt_off0000ebcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCD 17756 bytes
SHA-256: 0be91344d564f371d472834fcbac1c94b83c42cbe5066d497b36ece36f31ee27

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