Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ada0c04bde6d069…

MALICIOUS

PDF

70.6 KB Created: 2021-09-30 10:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a6f86d57e03bd13d2725774da587c667 SHA-1: 5cee2c3495bbe7f98ace6b67771e4ecfdd95d74d SHA-256: 6ada0c04bde6d069975f547a284fa2b9d195b14ed086e79940a1ede01ce578eb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged as malicious by ML classifiers and ClamAV. It contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting and are used in link farms. This indicates the PDF is likely a lure to redirect users to malicious sites, potentially for phishing or to download further malware. The presence of embedded JavaScript (T1059.007) strongly supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=hill+climb+racing+mod+android+1 PDF link annotation
    • http://rqconsultores.com/userfiles/file/4057971147.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210915161151.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210901152646.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/jofazelozo.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/vajogonam.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/1832388206134618fa6e95.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/kimejiwujidotikan.pdfIn PDF document text
    • http://mega-stainlesssteel.com/uploads/image/files/70981590046.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/lifobanararijebiwozep.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/46149970272.pdfIn PDF document text
    • http://ux02.wadhost.com/js/ckfinder/userfiles/files/42778638628.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/labejewigisokoxejokabu.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210907_143325.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/1fc48a72e68a67cb649240ca5f57fc8a.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/90713406655.pdfIn PDF document text
    • http://moneymaker-gold.de/files/doziganu.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/xaxere.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16144c5c5ea99e---vivigewememaduzebizebu.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/telilebolawele.pdfIn PDF document text
    • https://sadhankendra.org/erc/media/6937529881.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/tumex.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_off0000ae5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE5E 18164 bytes
SHA-256: 0d8a1ffcca97673ef203eb06125eec72217b78e2c0a0c3cf81e86b49c38d8efb
font_01_sfnt_off0000dd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 10496 bytes
SHA-256: 8a7f63c3e0162068176cc2b88122039de19c89cb3f5ec4c7afba402a8e8abffb

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