Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7292a4c9b0798c…

MALICIOUS

PDF

93.2 KB Created: 2021-08-13 21:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7ed6b01723521247685e01952cdc018c SHA-1: 84e578ea840b46280cf21a931c4eece3c8f0c715 SHA-256: eb7292a4c9b0798c791fc25219374c80a96629efa1c350c061bf84fd0497485b
164 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 URLs, many hosted on compromised WordPress sites or disposable domains, suggest a phishing or malware distribution campaign. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=my+backup+camera+quit+working PDF link annotation
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/55275510200.pdfIn PDF document text
    • https://aneri12.cz/res/file/83908633426.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/35076410812.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/45a691629dca93a2265ca08643698448/jibififekel.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/48979513980.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/kopajowasilujimeli.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2259f49a0b---najutonikowetebesawabe.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/8900840343.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210626144212581.pdfIn PDF document text
    • https://moolans.com/uploads/files/zozasumepifinobijudo.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/pofotiradazo.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607710ea7e21e---92984322340.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc2400e616---tasutewe.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160769b24e51f7---kawomebagewuvulo.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/d3e19e2d86fa5a0ada9283c3d6d594e9/jezid.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160740c7add68d---falari.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/73085345488.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/fujiwemod.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/f5f9317b0d4702bb2cb0e4d257bfcd07/36416075233.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607644189016e---87023745428.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/bq2v1msqfl1g6rbnuuc3fc3qao/82661408196.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/edu95cfk9ugnmauqvheuupfvrb/rofasivowu.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/pijomixifegamorupudiv.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/41535543805.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_off00010564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10564 11176 bytes
SHA-256: b348b7098f059c66de02d7661f34216e00efe32661574eafa2fac21e4b3bb73b
font_01_sfnt_off00011f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F13 18176 bytes
SHA-256: e3903b4bf068d0565a408d2e72eb12ea6afcd689bad8a45cc8b8077684a97c24
font_02_sfnt_off00014f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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