Malicious PDF — malware analysis report

Static analysis result for SHA-256 2088617a849951ee…

MALICIOUS

PDF

76.1 KB Created: 2021-09-18 22:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5d10f80bcb6894534db57d749e392b94 SHA-1: b58b6487dd18aede739e29fe7536322d62c074f7 SHA-256: 2088617a849951ee95f41dddb02cd961775e4cd177c3c030e8f7a404a3e257bd
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The PDF also contains numerous external URLs, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7451

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cructi.ru/uplcv?utm_term=dragon+ball+super+game+download+apk PDF link annotation
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613184f245695---dejezipigod.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16142b1d7c40ac---tibolijunabirodosebuti.pdfIn PDF document text
    • http://decorstore.eu/upload/file/78943790635.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/16547143800.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/tiwifib.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/52563249649.pdfIn PDF document text
    • http://hladonural.ru/upload_picture/80836222752.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613245abcfca1---12463566.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/49569588343.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/61746817036.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/99956427420.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/202191225611874.pdfIn PDF document text
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/wofosiw.pdfIn PDF document text
    • https://processwork.archerhuang.com/ConImg/files/4388095415.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-9-10/20210910170734902285.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143ecdfd9543---31878002818.pdfIn PDF document text
    • http://controlsystemco.com/cache/fck_files/file/95134431596.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/zomozegatagup.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/63705997698.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/8954908396.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/3570344036.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202109120103558603.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/jeporatiwemigusineruxigav.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_off0000f910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 18468 bytes
SHA-256: 00602e3f83f19a6e72d7c73a51d8dfbe58a51f8caefbaea35b15d3cdae6e2e7a

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