Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cdb4ecde6c6fe1d…

MALICIOUS

PDF

86.4 KB Created: 2021-09-01 15:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 34cdf9e485ab34ea1f2f545725a4a3c9 SHA-1: 77359daa283ce80d4da32a3a6e0a2fda3862aa78 SHA-256: 0cdb4ecde6c6fe1d68d5ef439804ff116296ab410eb36e1d6ea21b85d3c14573
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The numerous external URIs, many pointing to compromised WordPress upload directories, suggest a link farm designed to redirect users to malicious sites. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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 http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada06659d92---98077138942.pdf In PDF document text
    • https://chaplains-camps.org/upload_picture/file/45581526620.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/wosagojujovomufamo.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/1680170757.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/39170136207.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/berenivegosagiwum.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d331bc437d---7038560340.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e01016ca83---60422239540.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/48e40g158s79af8cug3sg38ts5/29505023056.pdfIn PDF document text
    • http://msiutilities.biz/documents/tedikokakevineruvagog.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095731eedcb2---14898638459.pdfIn PDF document text
    • http://traviet36.com/upload/files/25475114189.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160988a0ac8e02---sofededofi.pdfIn PDF document text
    • http://ckpak.com/fckeditor/userfiles/file/6449461534.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/nolofimuzifala.pdfIn PDF document text
    • http://poledance-chrudim.cz/files/file/tasolukefonegodoleji.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/dodimu.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/xumesatilemupidedamolisep.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/de42c73e71b5a2523e46d1317d444550/26375474689.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/xuvuxifafewezojafi.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/99920565333.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/9b1321933b2db0ad25c019d30f08860f/91759926750.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/letamokijiloxabiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=transference+in+relationshipsPDF link annotation
    • http://www.thaiticketmajor.com/static/imgUpload/files/75917508454.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_off0000eec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC0 17492 bytes
SHA-256: 568e50e59b311c4a26c8a5ff1065fb2992a88d8d52bf4af419d9f87aa2ce9c80
font_01_sfnt_off00011bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D1 10540 bytes
SHA-256: 2fe54901430ac4954a9cffb4957ce191713e354d809848b98d844b0f617046af