Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc62f696223508c…

MALICIOUS

PDF

67.8 KB Created: 2021-09-12 14:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 578ec8d4d425f91652030b269efea4a6 SHA-1: f1d86d24af6ab6052b425b099eb1b39ad3840d3d SHA-256: 9cc62f696223508cbb757f0bca2462f98f71f809eb488e6c99d47f4689ff9066
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-only appearance, and embedded clickable link. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution campaign. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://mehfermobilsaglik.com/userfiles/file/dipefog.pdf In PDF document text
    • http://abpjseah.news-read.com/upload/files/tozipatubatodaxuraredafov.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/fezuwopewafabodibuwepad.pdfIn PDF document text
    • http://freetds.net/userfiles/file/kebexodijed.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea628e8d2f---57434332007.pdfIn PDF document text
    • https://samuelben-horin.com/userfiles/file/givivazaxuzuxiriku.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16136de7ac1705---58638172234.pdfIn PDF document text
    • http://evola.it/userfiles/files/pugisoxobufominedudoj.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/2062753886.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210905220827.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/50425313020.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/71872677055.pdfIn PDF document text
    • https://kentacademymiango.com/userfiles/file/davupapufozemelunep.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210904054729_0zyuta.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021091001353056.pdfIn PDF document text
    • http://innersolutions-uk.com/file/34943203103.pdfIn PDF document text
    • https://nistd.in/userfiles/file/14183180386.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/redam.pdfIn PDF document text
    • https://stvorki.ru/files/file/30185667107.pdfIn PDF document text
    • https://seikai.jp/free_images/files/junowubovisikiweburof.pdfIn PDF document text
    • https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/mofer.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/33380452090.pdfIn PDF document text
    • https://macjiboter.macjahisa.si/files/file/ledixemegewitinifolik.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/pekinizawotixe.pdfIn PDF document text
    • https://reformedgeneration.com/userfiles/file/70733365235.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+download+kodi+on+android+tabletPDF 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_off0000af0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF0E 14092 bytes
SHA-256: 2c81c70fb01b4eedfb7158469d427d221c068a372c349c703d16d7e139224731
font_01_sfnt_off0000d234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD234 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4B 10380 bytes
SHA-256: a0ce68bd9074e74d6ddbc43cb2e267e45fdf74afdd889cb50d730fca2f458518