Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d8976ae15ad903…

MALICIOUS

PDF

74.4 KB Created: 2021-09-20 04:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ebe9e99ee3527ed3cb9f3731b4f5875e SHA-1: aaa263e2d5af072eee75f035bd3af7a826e9beb3 SHA-256: 54d8976ae15ad903004f67048b700239ee47672abb3e471233d4de6aa69b6fce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The PDF contains numerous embedded links, many pointing to disposable or unknown domains, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or lure users to malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/ch7jqnf51jpn5kn8qbqraee627/suravelizegewivetoj.pdf In PDF document text
    • http://tv-kitchen.ru/files/files/51098159523.pdfIn PDF document text
    • http://bilcafe.it/userfiles/file/badojirovubererira.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210911015549.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/86841146272.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021090108001173499.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/vorigilenesagozeregesevax.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/vipebamewosomuj.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///seseletil.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210914062804.pdfIn PDF document text
    • https://rumputhijau.com/contents/files/31739191447.pdfIn PDF document text
    • http://steakpluspizza.us/userfiles/file/50296522973.pdfIn PDF document text
    • http://ingore.cn/upload/files/vufefigurowa.pdfIn PDF document text
    • https://ka-base.no/images_students/files/gutivado.pdfIn PDF document text
    • https://hawkseyetravels.com/assets/ckfinder/userfiles/files/87636181381.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/risemibozekenuvizixi.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/26327175372.pdfIn PDF document text
    • https://wanna-drive.nl/files/File/gezujalugiletepili.pdfIn PDF document text
    • https://gibidesign.com/fckfiles/file/28605589181.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/renatode.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/47361738974.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=organic+reactions+and+their+mechanisms+pdfPDF 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_off0000c0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A4 16432 bytes
SHA-256: 1b813c5c14c79ef982ae2f490e3cb14763c249f7701806645bbd8c8ed176aa14
font_01_sfnt_off0000eaea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEA 11048 bytes
SHA-256: d743f09539b4dd88b7045f225383f65fc122cc4464dcc693eb983fa465354ae6
font_02_sfnt_off00010447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10447 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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