Malicious PDF — malware analysis report

Static analysis result for SHA-256 0076add92c1a5531…

MALICIOUS

PDF

75.6 KB Created: 2021-09-11 14:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c157f159da5ab58a75982c116c1c51f2 SHA-1: 71815330677ea726fa11030acc4081fba863103d SHA-256: 0076add92c1a55312339984cbbd133a4b847cef240765463d82d1f53d7ad815b
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The presence of multiple compromised CMS upload links suggests an attempt to distribute further malicious files.

Machine Learning

  • Nyx PDF Classifier clean score 0.2255

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nfc-lampang.com/user_img/files/59827018825.pdf In PDF document text
    • https://yennenga.org/business_school/uploads/file/xefusem.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/wewaburumebutuxedaviv.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/37246059815.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/77364952511.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/23039051237.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/l5qp3f6khmlg7qpd2g1dimnj31/dodaxizodudekore.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/gipezaroxakonosojowu.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/60331681621.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/sudapozonek.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/zujadusalozowumigoso.pdfIn PDF document text
    • http://nemochem.cn/upload/files/wawogemojafigarugiv.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f17be11287---ropigazozenide.pdfIn PDF document text
    • https://baobiachau.com/luutru/files/46999707130.pdfIn PDF document text
    • http://irths.com/upload_files/files/tagatupaxupuzoduw.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbf94a57c3---gewetetivovajuxorivimi.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/19200826153.pdfIn PDF document text
    • https://777mto.info/contents/files/9914827544.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/laroto.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/mixizu.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/b2evhnr9i2puu1mrrq2i6knl192c7qg2/tizevuvomafituro.pdfIn PDF document text
    • http://www.omt.ntou.edu.tw/ckfinder/userfiles/files/semoweke.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/bowom.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/budex.pdfIn PDF document text
    • http://huefpdf.org/upload/file/retavepezakoveb.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/52048501626.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=fs+17+free+download+unlimited+moneyPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF6 16780 bytes
SHA-256: 6d195c6595c4b7817c97097841278925b02cebde50af2b5aa033ac0c3fc2e56d
font_01_sfnt_off0001089a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1