Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf5ad0e2bc1912b…

MALICIOUS

PDF

81.9 KB Created: 2021-09-09 08:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1c74b8499ea36685131308622a600f40 SHA-1: 46812fbcc2d7c7ef154ba529468b0c50e741a6cc SHA-256: ccf5ad0e2bc1912bd24c485bf530e0e67b5e0cd8297e28643ff3bb678974f884
126 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, specifically as Pdf.Phishing.Trojan. The PDF contains numerous external URIs, with one heuristic identifying it as a link farm on disposable hosting. This suggests the document's primary purpose is to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://philabc.ru/uplcv?utm_term=menghapus+pop+up+iklan+di+chrome PDF link annotation
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/26463483639.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/646558848.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/mupalobovezavinozetarob.pdfIn PDF document text
    • https://optical-axis.com/uploads/files/202109050745355663.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210906035944_ODUwNjMzNTgzMA==.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/52615434918.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/dinuzemagedom.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/43942938884.pdfIn PDF document text
    • http://dienlanhhuubinh.com/upload/files/dalifajuniwolaxigiwas.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/84681896899.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021090613503935.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/besediwulaganoraxulesi.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303d0a966dc---kuwugota.pdfIn PDF document text
    • http://objets.immoweiss.lu/userfiles/files/mederofisipapudevisezi.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/wujenavoj.pdfIn PDF document text
    • http://goldmustang.ru/files/files/82240265089.pdfIn PDF document text
    • https://ikorti-iao.com/userfiles/files/87178262743.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/zikina.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/96442729643.pdfIn PDF document text
    • https://stockbauer.hu/uploads/file/labejufa.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/12010361913.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210907151732.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/ligul.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/jejetatubenexitato.pdfIn PDF document text
    • https://edinburghpools.com/contents/files/zavapudirazaf.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/65797507018.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_off0000d9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A5 11048 bytes
SHA-256: e1914e7c67e4d074201e48ad04864f40395c8b9ada4cdae8a9e36ce2492a2fec
font_01_sfnt_off0000f2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EA 17944 bytes
SHA-256: 479c793fad925687a8249df5c98e25a68ea0374da7ce961df0c2a8bf355c3e08
font_02_sfnt_off00012143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12143 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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