Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee77747b95f9becb…

MALICIOUS

PDF

85.5 KB Created: 2021-08-06 03:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9cd3e01aa5f1df6bb70afa1b8eb58534 SHA-1: 34232efb963e6ab5c80bd0d4c9f8535448ffe439 SHA-256: ee77747b95f9becb02191aae342e12069fb4c9d2da1640e0e279f497f38b96bc
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a PDF link farm, with numerous external URIs pointing to potentially compromised or disposable hosting sites. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=wheelie+29er+mountain+bike PDF link annotation
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/moboruf.pdfIn PDF document text
    • http://fygl.net/uploads/file/050437381868.pdfIn PDF document text
    • http://dbhsreunion.com/clients/21010/File/gowatusidotulixufidijo.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/fb0516c6ecae3ea5291bc389316c0579/93818129554.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/6488481925.pdfIn PDF document text
    • https://pasarangroup2.com/contents//files/jubulomid.pdfIn PDF document text
    • https://arredamentigiacobbe.it/file/gomutopixe.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/99806715279.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/161053605a9e8e---77021683424.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/foxujinazab.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/cruhfaqp505sh47o6hraikpugd/labezavukava.pdfIn PDF document text
    • https://polandpools.com/contents//files/mumewoteso.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/bagaj.pdfIn PDF document text
    • http://d4smontreal.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/41784783468.pdfIn PDF document text
    • https://blugarden.eu/file/zagudilatezesulifufal.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/30682842668.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/sowetunofosomefamewokikaw.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84690ab87---68593084998.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/magenukugelusizodanusafi.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/28590739791.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc74e4b97a8---60279890615.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/gegakesomulobidukuxoxole.pdfIn PDF document text
    • http://1984wnhs.com/clients/2/25/250e0aaa51dad033202e6c34d8602b4d/File/zumabifexovamap.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/4656846649.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_off0000ec4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4D 10820 bytes
SHA-256: ed5bbaefad6c49419d7d980987341b111fb90f178715e08b7278caa1f76eee04
font_01_sfnt_off00010526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10526 16732 bytes
SHA-256: fc84873896c407445be64d89a16130e02671f96103417cb8c585bba937b36ae1
font_02_sfnt_off0001307c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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