Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa0d29b90ef4c20…

MALICIOUS

PDF

84.3 KB Created: 2021-09-13 05:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a8a77494279607e4b98ec402c1c3ca09 SHA-1: 13ec7850f4ccbfaccacd06c53a92c37783d465da SHA-256: cfa0d29b90ef4c20dca931f84ed49b312ee1fffa21b2f12f89d4baaa1d7f9f73
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 4

  • 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://philabc.ru/uplcv?utm_term=download+rangasthalam+full+movie PDF link annotation
    • http://ckpak.com/fckeditor/userfiles/file/ronamemabodapefalipanunip.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/rezududiledalapeketa.pdfIn PDF document text
    • http://hepiran.com/cache/fck_files/file/dizawuruvaxunim.pdfIn PDF document text
    • http://ubytovani-budejovice.cz/picture/vtextu/file/xezavizufedodanafomowuxup.pdfIn PDF document text
    • http://villaroyalenews.com/userimages/70352736379.pdfIn PDF document text
    • http://southerncross-ex.com/images/blog/file/53643735785.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/66441736020.pdfIn PDF document text
    • http://miryangpension.com/FileData/ckfinder/files/20210907_259DE7D1CA81C1A3.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613db53fb4d48---buvodam.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/nimogiduxagaxugesifo.pdfIn PDF document text
    • http://topoint.net/userfiles/fckFile/20210907123210.pdfIn PDF document text
    • http://ducnhua.com/upload/files/76532418824.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/xuvabeminatazapezugafa.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/21090316015791600868jucg.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/42208101920.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/retitipelogot.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d236b566b5---zonojolunile.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/7422594711.pdfIn PDF document text
    • http://barefoot.pl/userfiles/file/vukut.pdfIn PDF document text
    • https://optimuselearningschool.aels.edu/learning/site/images/uploadfiles/xabajixaxikanuf.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/22553598315.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/nisapupugul.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/20554303350.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-8/20210908233115694053.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/78943526152.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/petirepolex.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/36182623365.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_off0000e401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE401 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC18 11056 bytes
SHA-256: 0b9a8e7042cffe2eaa1341e6cac88d46e86ac44cef930a322b874abc349f9ba4
font_02_sfnt_off0001157c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157C 17576 bytes
SHA-256: 76e51d80b551c580fc861fef8605cd604cebe2e4237f95298f94b881df9512b0

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