Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf0adf80f29881d…

MALICIOUS

PDF

40.1 KB Created: 2021-09-03 19:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a0157d22f6b743e73846b5c79cc6bfda SHA-1: 3558cccf74086ee0ac0daf8665221c711bb90305 SHA-256: baf0adf80f29881d83c6579474bdae61d78a1be046f64f3384a31f1cbb223d30
194 Risk Score

Malware Insights

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

The PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing lure. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of an IP address literal in one of the URIs further indicates a deliberate attempt to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9490

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://chcial.ru/uplcv?utm_term=free+rondavel+house+plans+pdf PDF link annotation
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa301bd243---molekujavu.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/60340039875.pdfIn PDF document text
    • http://guinyardfamilyreunion.com/clients/62985/File/62702941350.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095c6f21013c---suxoruwifumapugojigobikeg.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/sivesudiwepipelefonefudez.pdfIn PDF document text
    • http://bienbao.net/uploads/files/8204240039.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae96a6ad647---rofejufedu.pdfIn PDF document text
    • https://parkettworld.com/upload/files/39801808464.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/22883500598.pdfIn PDF document text
    • https://funbugs.ie/files/file/18523611859.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850c886fb6e---83660721596.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/8044473852.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210626_a09d7.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/jelig.pdfPDF link annotation
    • http://coinproject.com/userfiles/image/file/bikubijuxujijawizija.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/64hqjvj0gv2nj663jbjgop6771/61200849076.pdfIn PDF document text

Related samples 8

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

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