Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9dff2f4823fd8c…

MALICIOUS

PDF

66.4 KB Created: 2021-10-01 13:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 12674768e0a9fb9efb7c2f4490de07a5 SHA-1: a5c612047bc94551783371208dd0709b997ea18a SHA-256: fe9dff2f4823fd8ca9786ad44b20ac8dbe5fb2fcdefea69df8f7fd34e14147b2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious domains and appear to be part of a link farm designed to redirect users. The primary lure identified is a fake download link for 'alight motion pro', suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144c5b5a0ff8---taduxederujidumomezizaxim.pdf In PDF document text
    • https://paymentor.nl/uploads/file/3126254904.pdfIn PDF document text
    • https://computerzone.pk/file/kinixewajuzomaros.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/seburimafimowumu.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/vujopipiwowuvavu.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210913012537900992.pdfIn PDF document text
    • https://servicepapik.ro/files/kadiwenupekur.pdfIn PDF document text
    • https://gestionarival.com/userfiles/file/34553505866.pdfIn PDF document text
    • http://nbc.com.vn/ckfinder/userfiles/files/zigavofonuwujop.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/kebijumusipatesaredaveno.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/86384303996.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/jelevedawezoti.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/4401832905.pdfIn PDF document text
    • http://jsdarvin.com/files/88987122356.pdfIn PDF document text
    • http://gyn-ordi.at/myPix/file/7259596724.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613204ced6e92---13739178755.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/21180715209.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=alight+motion+pro+download+pcPDF 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_off0000a690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA690 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000bea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA2 14948 bytes
SHA-256: 3f7f16bbd31a23c01b7e61174114ff17417fef5d22b918f13adf7da26466b035
font_02_sfnt_off0000e48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48D 10728 bytes
SHA-256: 670416bc0c2b003d332615671ffb2a78795fd458ad37943e513ef755be720025

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