Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd5d4bcb5477d90…

MALICIOUS

PDF

52.6 KB Created: 2021-09-30 17:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 297b72137147f051e9b22cdea69eaa7d SHA-1: 71181ac4e222bf6357268a2d1a9d54685d2b8fdc SHA-256: efd5d4bcb5477d9028dd73c92c2a13ed494066cfd329a070958a9229c6b4c2cd
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. The numerous external links, including one pointing to a raw IP address and others hosted on compromised WordPress sites, indicate a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8448

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
  • 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.
  • 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://nomylo.ru/uplcv?utm_term=death+becomes+her+full+movie+online PDF link annotation
    • http://mgocsm.in/userfiles/file/fopujilolobul.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/82973600729.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/kuwoxiw.pdfIn PDF document text
    • https://granitnet.hu/editor_up/85980248652.pdfIn PDF document text
    • http://dienlanhtruongson.com/upload/files/fumefepawatobalu.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-19/20210919191250815274.pdfIn PDF document text
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/13229760282.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/14481677635.pdfPDF link annotation
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/rowedajisixenutifenuzajuz.pdfIn PDF document text
    • http://wwsm-hk.com/files/file/603712158.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16134146acb366---gosapozekuvu.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/xonulek.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/duviligufavoruda.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16153a396be71a---51612597745.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/73253915062.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613729ed3a75d---vijajapi.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/paferafiv.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/26626255706.pdfIn PDF document text
    • https://norservis.com/files/files/60473644527.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/6368407913.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/kemujupuzosig.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/37553520001.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/67548894580.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/38182038329.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/69810558454.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_off0000b7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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