Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7e1726ae34fd36…

MALICIOUS

PDF

84.7 KB Created: 2021-09-23 03:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 144b7588972ca69e218279d72cf9ffff SHA-1: c56c7338c20ffdb2b3f7e080381d7bd6e322d564 SHA-256: 7f7e1726ae34fd363aa587d761b7371a9223078a0c3e2a39bf3d9bdfef269713
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the exploitation of PDF vulnerabilities to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ketchas.ru/uplcv?utm_term=net+ionic+equations+pogil PDF link annotation
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/kabegenupan.pdfIn PDF document text
    • http://phulieumaymacbaoco.com/hinhanh_fckeditor/file/35727375921.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16148e92f15ce4---30067360634.pdfIn PDF document text
    • http://montereypark.kopanramen.com/uploads/files/ziworotifofegapigutojor.pdfIn PDF document text
    • http://swhos.com/upload/files/tujemuge.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614198f3aacfc---bafuzededaxumu.pdfIn PDF document text
    • http://belniig.by/public/file/konew.pdfIn PDF document text
    • https://loyallcanada.com/editor_files/file/ropawarawonur.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/44132722875.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca99f37ba4---kubafuguxomefezinanuxali.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/26240825794.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/93671217487.pdfIn PDF document text
    • http://candientushinko.com/images/file/24457770212.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614547935daad---28204304152.pdfIn PDF document text
    • https://foulardfotografando.it/file/97267689275.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142fb9c01b05---35082777000.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/20272584083.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/6376fd3d8cf78f796694b46c7db01068/sojitugi.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/61814897591.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/81375986955.pdfIn PDF document text
    • https://autopits-directo.migrupoq.com/ckfinder/userfiles/files/pimidizalub.pdfIn PDF document text
    • http://saeronbio.com/userData/board/file/xomowepusonalumok.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/fudovizake.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_off0000e160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE160 10672 bytes
SHA-256: 07bda39959f999b74f3dfdbe860d939bb4b0294da54e2d4a1b71cc6aed0825cb
font_01_sfnt_off0000f9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BD 20136 bytes
SHA-256: e2b179ded6a0079c0926bfdf32a05e9423b1057b5b6db3b894942c28305b3ed3

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