Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c62988fca6937c…

MALICIOUS

PDF

60.9 KB Created: 2021-09-12 15:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d16988b4970a15c35342e9ee36f70df6 SHA-1: 81979857e20e92fe00c9be01fe7795d94fea7228 SHA-256: 34c62988fca6937cd32da5972bbca903ef1d4a76236a58ce59de8d10973d86d1
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several heuristics indicating it functions as a link farm, including links to compromised CMS upload storage. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware hosting sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or content-luring campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7846

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 http://analhospital.net/file/files/3253361818.pdf In PDF document text
    • http://salespate.com/userfiles/file/sebidemitof.pdfIn PDF document text
    • http://sun-apartments.pl/data/pages/bajubewofoselelavojabiju.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/bb5a6d1c2670950b87c80b897b392514/64553191465.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c65bbecdd---xusekoxixiz.pdfIn PDF document text
    • http://lerucherdesanges.fr/userfiles/file/budeferisexurip.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/8702775922.pdfIn PDF document text
    • http://portalkucharski.pl/app/webroot/media/files/natunebajigemexub.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/sagoniro.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/20116629965.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/73017856801.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/09-07-12-29-30-90.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/vutopikir.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/niritivesovuri.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090917241392.pdfIn PDF document text
    • https://dtd.com.pk/ckfinder/userfiles/files/36490220235.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/86821294451.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/99203061771.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16136d58d3f7ac---wanatolavefaka.pdfIn PDF document text
    • https://keepingscore.org/userfiles/file/parawukojamofatoxefe.pdfIn PDF document text
    • http://renknh.com/ckupload/files/wewijekobivitole.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/83487969650.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/gizozab.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/folib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=contra+return+gamePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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