Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67e2ab245794309…

MALICIOUS

PDF

77.4 KB Created: 2021-10-05 01:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 576f97e9caf7041867c2b447baf27569 SHA-1: 69d7b380712a5c91bf20ddc62e42315150b6ffce SHA-256: e67e2ab245794309497f7dbcdae580887fccac504f111d2928e6ea507cf65d07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://coretry.ru/uplcv?utm_term=30oz+to+cups PDF link annotation
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/20137551353.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/40244073577.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/1129800376.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/gepilunuj.pdfIn PDF document text
    • https://techlan.pl/files/file/58705552626.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/94978835486.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/rujukazikuvojofulowu.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/sesalanomaro.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/17517835669.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/43784269157.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/86241580361.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210903014650.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/wajowotariripenujezata.pdfIn PDF document text
    • http://proallprint.com/userfiles/files/towowon.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161422531a23b9---muleruxufomitasijiviwev.pdfIn PDF document text
    • https://dtd.com.pk/ckfinder/userfiles/files/zaxavaki.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/l6dqg17oulk7o2ti3ckn6orpms/70302738225.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d6fec5443---fikulubamodazib.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/37487336872.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1614014a5601f0---fefuvurujefibijanuwuxima.pdfIn PDF document text
    • http://swapnakoodu.com/fck_uploads/file/96088442703.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/kiwefexirijupovolejifa.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/2329661813.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_off0000c773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC773 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8A 10088 bytes
SHA-256: cec511fbc0b398f596699b5606536a421ca5d5bd460dc9dcdff076038cd4551d
font_02_sfnt_off0000f631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF631 19324 bytes
SHA-256: 77a65498a1bbd1a806e2cdefb334189b15b307a22cda506b55a42da6f8f524be