Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd022ea7694dafc9…

MALICIOUS

PDF

82.6 KB Created: 2021-09-01 08:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7ccc33b9525d36180b3fca6a4641a377 SHA-1: a1d7646d77c5805ffcccd23d96ea7c81633c6dfa SHA-256: dd022ea7694dafc949c58503bbe90aebdebfc1a925a71c62a33b4aeee5e9aaef
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple distinct hosts and the use of 'utm_term' redirects further support the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ccnoie6lekf5t5otnjqg15tkf8/jezidew.pdf In PDF document text
    • http://2ds-creations.fr/userfiles/file/5716261940.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/4q778uho7vslbgm0vpvric3hhb/46445678324.pdfIn PDF document text
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/kabodozujivub.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/xafuderenitu.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/suxofetemerexib.pdfIn PDF document text
    • https://quatden.vn/webroot/img/files/17986543013.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/5817559f36cf19d5a65bde32cb4aebdd/bibutituwuto.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/12833064133.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/4hp9df2b6tp347gnq5m3bom5pt/vasedi.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f7773502f---77219384787.pdfIn PDF document text
    • https://laser123.com/geektic/files/zawipakavakagu.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/bikimuzagokuzu.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ba14d2c37---85036452110.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160997c8991879---tusixisotoxivepesexazadag.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/niburibajunokam.pdfIn PDF document text
    • http://mqskin.com/luutru/files/zarisevux.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96f61499b1---12633728293.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3c843b881---fusulufinuwap.pdfIn PDF document text
    • http://mramus.com/fck/imagesfile/5012878106.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/wixumigakovokitokinot.pdfIn PDF document text
    • http://ssanadia.in/userfiles/file/92026284824.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/ltiot2lpcarejp08e4us4ku10i/segonowazanufumixe.pdfIn PDF document text
    • https://myhoteltrip.com/userfiles/file/37072912083.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=the+miseducation+of+cameron+post+full+movie+online+freePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9A 17424 bytes
SHA-256: c15cf31ec9a76606347166d7f21080d88bce3ecbf97e6c86fa20acf420d161bd
font_01_sfnt_off00010a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A50 11016 bytes
SHA-256: ee083dc6a94ebe64011d47de7d9fd5b8cfcdc5bd20e27915171a84dbc23d375f
font_02_sfnt_off000123c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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