Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee1cfaf7540cdf1…

MALICIOUS

PDF

72.2 KB Created: 2021-09-06 11:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bea0980001b5a723dd1e70a5367ca272 SHA-1: 0635bdf020f9c5ce33ab0412cc622ea1a5d89f4f SHA-256: 4ee1cfaf7540cdf1291edee544e667d7a66895de383d3b8dedba0003e9a969ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites hosted on disposable domains. These links are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://soalmatematik.com/userfiles/file/23847029771.pdf In PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/59c7bed4e224fbf2b6c574a3dbe9c083/safosa.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcfba700a8---39527470742.pdfIn PDF document text
    • https://mtmhomeschool.com/mycms/uploadedimages/editorUploadedImages/file/nazonisenawakuzulokizejiw.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/a50b1dec70cc8caa4860783a343b740f/bumajeturumega.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/63846291850.pdfIn PDF document text
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/javipimob.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/lizasapujegugewufabeb.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a18df19bf0---15970952563.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/jasitelo.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f224d73f6e---kovokujom.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/nusanowavuboxagaw.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/nukoxodevamibe.pdfIn PDF document text
    • http://murzilka.biz/images/uploads/file/30053119657.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e00f6976a4---8124414880.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/74930475940.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/674d9c1403173ff14b852adeb29416fa/vasamezawitikaperipazilo.pdfIn PDF document text
    • https://giustofiori.it/file/54597932334.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a8173c7b8---60650804527.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/19049527871.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/7055648b763c56bf497473207f230079/95197100799.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/14201913146.pdfIn PDF document text
    • https://nadrozmerne-sklo.cz/uploads/jizub.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/78136018481.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=fire+safety+poster+pdfPDF 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_off0000ba9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B4 10432 bytes
SHA-256: 71a786f3d9fe3af27686369df02877d31bb4783bb4ceafc5a69ef839ba795b5f
font_02_sfnt_off0000ea83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA83 16112 bytes
SHA-256: 213259859e7e80104fa5ade67c08a5ea44c1ea7723841210c14f0dba967dacb8

Open this report in the interactive analyzer, or submit your own file for analysis.