Malicious PDF — malware analysis report

Static analysis result for SHA-256 030610e2b632508a…

MALICIOUS

PDF

83.6 KB Created: 2021-09-18 20:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 393c2bbb8c6c9d10417bfeda848620ad SHA-1: 6c928b7caf135b67aa62a30c988714ed36f9b930 SHA-256: 030610e2b632508ac3bedb3fef98a187c9baa82024e8aed908a69c03b3438aa0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress uploads or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://pistant.ru/uplcv?utm_term=a+tree+grows+in+brooklyn+pdf+free+download PDF link annotation
    • http://ebbers-schilderwerken.nl/uploads/files/minawiratexasim.pdfIn PDF document text
    • http://sbsinternationalschool.org/userfiles/file/xozegojudoxafegubepivi.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/893401479.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/37246965683.pdfIn PDF document text
    • http://www.romanschatztruhe.de/img/files/74378142829.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/jibotuz.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/66310981123.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/17029326065.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/37217644191.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/bunirenuso.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/53895263094.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/tapebewonibaravonone.pdfIn PDF document text
    • http://billsky.ee/files/file/suzakagerokefomuneviziba.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/linodesudinirezira.pdfIn PDF document text
    • https://biodez.lt/i/File/zirajefesotovomib.pdfIn PDF document text
    • http://pasaru.com/upload/files/46568285617.pdfIn PDF document text
    • https://easresidence.ro/app/webroot/files/userfiles/files/99215862820.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/pifixusuxalulifa.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/34248a150c6f0ac26abbd90cbef59da0/40128479052.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f43dc8277---32472162650.pdfIn PDF document text
    • http://pjteam.hu/uploads/25845734036.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/78922720088.pdfIn PDF document text
    • https://baptistfriends.org/media/kuwamepapibep.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/kolewexasudo.pdfIn PDF document text
    • https://rumputhijau.com/contents/files/41436174773.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/28cf200d6fa3a3f6a2126900c3f797c4/wegelopodu.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_off0000e10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF921 17588 bytes
SHA-256: cae07387ea28552c8c03eacdbad8458acc92775d106e6746b0490dbb6a58d5fd
font_02_sfnt_off00012699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12699 11088 bytes
SHA-256: 06e9f6fad43de6ea1b12e00b8c50a36255abc53431f3a56a7d71ea977e2235da