Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c47d90fab7ee9a…

MALICIOUS

PDF

62.5 KB Created: 2021-06-22 23:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0d4dc2e3d88e5c327dae80b207e81a27 SHA-1: b7702ff567b20198431f6c2f2e55a8b757708b7c SHA-256: a3c47d90fab7ee9ae7286e97a3a327c8b78a6373b77925a6dc79014af51de707
154 Risk Score

Malware Insights

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

The PDF file contains numerous links to compromised websites, identified by heuristics such as 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The embedded links likely serve as a lure to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8124

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://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095cda0a02ae---wiwivozimorejoxol.pdf In PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/ef6542be61b6a5d41af93df1f7f4b276/31570223256.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607948af55e8a---7498194942.pdfIn PDF document text
    • https://hirurgija.me//files/83620599922.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/komesijakufabosinetekuxax.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/14556381520.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210605_131138.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608c00ffbd277---dadasusodumotevomimidu.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160cf6fad8f25f---wakutikoladujefupiz.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210613033156.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/pegutemuvukevisulupodumu.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/tifipudopu.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/0i6ljve871lrl4ohp0gr05vmbp/76998655891.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fd3510f70---2853236920.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/10884867553.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/aa5d232042e71fe2f7f6dfa4ec50f298/bimomuxitovotuzilewaxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=convert+pdf+to+jpg+with+digital+signaturePDF link annotation
    • http://scripts.sil.org/OFLIn 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_off0000d178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD178 5436 bytes
SHA-256: 1bca6194abe580a294e0119daa89e848966a2cb14b6426cf445ab56699762b93

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