Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02b8da9f7ca8c09…

MALICIOUS

PDF

81.1 KB Created: 2021-09-17 21:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8ff9c27543ff8d8044e26fd2620d7df6 SHA-1: c58afc9a0768e7e3e84ad81f9a2666b081a29037 SHA-256: f02b8da9f7ca8c09dad531055fedef478bd52c061ce75c44abdf3bbc1d390e5e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and is identified as a link farm by heuristics, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded JavaScript likely facilitates the redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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://anyimaker.com/upload/users/files/85847876340.pdf In PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/xusewodujizufijikideveno.pdfIn PDF document text
    • https://grnca.org/img/files/files/fatopekemitowopem.pdfIn PDF document text
    • http://www.singchai.co.th/ckfinder/userfiles/files/karalarenipejebelur.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/41608628146.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/44490415657.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/josujiwoviruzigefojiso.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/limigixidujusufe.pdfIn PDF document text
    • http://fruitvita.com/files/files/seneziwagamapakup.pdfIn PDF document text
    • https://cahayamimpi1.com/contents/files/vamujedikutamepabenofag.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/50143098102.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f783ae827---vawutuvilot.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/rigifixegabogukajup.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210905_0B518AE74DBF07DB.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/59292847294.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/32185918148.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/fesixakojetak.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/64873758641.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/suvapuvinijerozug.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/zukeweje.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/550d6d703dfdb0b8fdc29564f9bdc733/xuxujasafemorogizikuba.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210906215415.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/waxopudasol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=viamaker+apk+download+without+watermarkPDF 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_off0000d9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F1 10736 bytes
SHA-256: ccda9b47617f09491a1233b2660a3f6e5f0b8c2cfc1b19ad8693eea9e3ada282
font_02_sfnt_off00010a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5F 16872 bytes
SHA-256: ba2ed07c9c255ddd3c7d512c63aa9dbb7f704b69ad92fed3a2b6a6533dbb722a

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