Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ea9bd994e7b947…

MALICIOUS

PDF

63.6 KB Created: 2021-09-17 17:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9de43a588555a90e5dda1da648823cce SHA-1: 0f6b50cf6ee716d654039b7331916a1eea03aecc SHA-256: 19ea9bd994e7b9476fb86d3c7a165011b45ad9bae9f1776e3b605bfeeaa3127a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, including one pointing to an IP address, and is flagged by ML classifiers and ClamAV as malicious. The presence of multiple compromised CMS upload links and disposable hosting suggests an attempt to distribute malicious content or phish users. Although no scripts were explicitly extracted, the PDF structure and URI heuristics indicate it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7270

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://synerhu.ru/uplcv?utm_term=god+of+war+3+apk PDF link annotation
    • http://www.jobsincrete.gr/images/_user_na/file/69269136193.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/33886612205.pdfIn PDF document text
    • http://worldwidestationeryholdings.com/files/file/zigodegepunagogusulirura.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/24162500092.pdfPDF link annotation
    • http://westernmaki.com/uploads/files/tuxaburuvagof.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/vomazokegeledivutof.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/161345d0cbf433---ferijatatatupe.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/26430851239.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/29305214387.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/13636286328.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb22ae76fb---5582332763.pdfIn PDF document text
    • http://defhjdrjioo.friend-match.com/upload/files/5112518309.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/vukawalirapodakixe.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/gagomigubilarewazebeko.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/robimulosotejajosivamire.pdfIn PDF document text
    • http://ortosprendimai.lt/userfiles/file/70192718238.pdfIn PDF document text
    • https://anglarill.net/userfiles/file/dakozojegolop.pdfIn PDF document text
    • http://elitacasa.it/images/file/jusuloju.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/gebisosisi.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/sefemisimabub.pdfIn PDF document text
    • http://tpfish.com.taipei/archive/upload/files/17375255960.pdfIn PDF document text
    • http://caythuocnam.org/images/files/92335565902.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/dc4d569754cb8145beb67498934f36ed/luziwiwonez.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1613cba0cbea8f---pubogopadupil.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/88931575917.pdfIn PDF document text
    • 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_off0000d569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD569 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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