Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde20d4e72e93884…

MALICIOUS

PDF

264.4 KB Created: 2021-07-02 19:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7794f42694152a6ba449f487c2cab06f SHA-1: b2c9989cdc6332a127d3033eb66b13e417c64485 SHA-256: dde20d4e72e938840254d8da835b12bd99c7fe8d4e784924b99da7f8f0cdae26
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or delivering malicious content. The ML classifier and ClamAV detection strongly indicate maliciousness. Several URLs are present, including one pointing to a compromised WordPress upload directory, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9845

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.
  • 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
  • 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://infrive.ru/uplcv?utm_term=positive+impacts+of+the+industrial+revolution PDF link annotation
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0ed80233d---fujogajutam.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719ad7cbd51---zuwutalujonolazezeris.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/56360512424.pdfIn PDF document text
    • http://kusadasidentalclinic.com/img/userfiles/files/jepamap.pdfIn PDF document text
    • http://clipsttm.com/userfiles/file///ravalesexipevutuvaga.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/6413bb3ed87f85003947b5e4407153b9/vobokevovokepipomigoxo.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/uncde9qcessq173jald5gouh97/6456235919.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/banafa.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/fasowelem.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/4e1d2e3fa8d9dbe8a95ef9eed0977261/29508314731.pdfIn PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/5461463906.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/mogib.pdfIn PDF document text
    • https://socohoteldanang.com/uploads/image/files/tijoj.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9578f0f1e7---jurozo.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/33564911243.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/kefisarejokutojopise.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/4986e7fe59e9821c55b359a8ac154a20/golimimenagurugiwufagef.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079547c5bd7a---28225089059.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/if79lcd611rf3bbfitmsfkpki7/fasefizur.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/5c69c3165652ca62da3b7b027e02d189/voxezijadawu.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/755c5f7b70ec2c7d250a859781eaa3bd/mipuwisuvelojuxavixukono.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/40348388944.pdfIn PDF document text
    • http://blueyee.com/upload/file/181558114386.pdfIn PDF document text
    • 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_off0003ac84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AC84 11052 bytes
SHA-256: 58af9d371532dc084db28448ccb1437c270dca6e2a4dd8ddd6acf5b38eb5fed2
font_01_sfnt_off0003c615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C615 20928 bytes
SHA-256: ab1f5ae9560f5da0ea1d856db8a9139939f89e97c06649876b215513c2340033
font_02_sfnt_off0003fb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FB1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1