Malicious PDF — malware analysis report

Static analysis result for SHA-256 2babc4a611986b2e…

MALICIOUS

PDF

75.4 KB Created: 2021-10-11 00:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 31aefce580711fc6c7e9e653eb890a99 SHA-1: e3352de2e10986504e38444a7d926fd313d1e97c SHA-256: 2babc4a611986b2e92c976792c389003612dc65f206b604b95de0af930e52395
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to multiple websites, some of which are hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs indicates a broad distribution or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://ephtour.com/FileData/ckfinder/files/20210917_1E44FB7275C68D07.pdf In PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54272662167.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156510c2ca31---33787873630.pdfIn PDF document text
    • http://uklearningnetwork.com/userfiles/file/75016194338.pdfIn PDF document text
    • http://maudchristan.nl/ckfinder/userfiles/files/66037610784.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/23522221948.pdfIn PDF document text
    • https://renetravel.ro/images/files/kuworodubovibekopuruzi.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/161442e01ebb5f---gokafubenak.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/96772420962.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/piropagigowexi.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/45170579573.pdfIn PDF document text
    • https://www.ijmsir.com/ckfinder/userfiles/files/wopegelaxi.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/27731719199.pdfIn PDF document text
    • http://hankyunget.net/userData/board/file/8734201109.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/juvusetif.pdfIn PDF document text
    • http://lagrupacio.cat/file/giwazufojusumogisibu.pdfIn PDF document text
    • https://uslugiinzynierskie.com/eurostyl/photos/file/81900190196.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/e647c5d631955fa4298b290efe60d4de/wevapojidowofulevijijoga.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/vezamedow.pdfIn PDF document text
    • http://artio.pl/files/files/26769305259.pdfIn PDF document text
    • http://ecole.ru/text/images/file/78969919939.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=heroes+and+castles+2+mod+apkPDF 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_off0000bd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD83 10784 bytes
SHA-256: 64ff610479d8a8a084c28eb1061f199ddf2f2b15dd5c25e7035ddeb95e0e5639
font_01_sfnt_off0000d662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD662 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE74 19496 bytes
SHA-256: b4f26d8a00a94a9b23b0edb78290565e06aa126e4de10441c25b45d3e81e4fd7