Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e0bad4ffcba307…

MALICIOUS

PDF

79.4 KB Created: 2021-09-09 12:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d68045bd6772b610bbab9432d4e94d14 SHA-1: bf4f5265140e9376141a5367800185ae2bfbf761 SHA-256: 72e0bad4ffcba3071f75e34653e13dd81f4205505485d52fc80261b9758da447
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or execution of further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://ketchas.ru/uplcv?utm_term=sms+backup%2B+not+working PDF link annotation
    • https://g4m3s-4p1-12s1.com/contents/files/rezodepafobarufizikodu.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/29742274957.pdfIn PDF document text
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/27873922651.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/76de98979a1e1f96f4a23a618bb13b1c/gifeguxabazi.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/kaxozedazamewukijafo.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329b9657c2a---35464830162.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/kizexonamatum.pdfIn PDF document text
    • https://resortweeks.pro/userfiles/file/21145623492.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/petefase.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/bugupekov.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/99855104420.pdfIn PDF document text
    • http://webbyshoe.com/fckeditor/userfiles/file/dalavusoxuxasajewiv.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/zumadak.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/68547652387.pdfIn PDF document text
    • http://quimicahj.com/admin/userfiles/userfiles/file/mafiboxiborenadigomajale.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/79145418780.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/dabiluzazoribetatexaraw.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/29289880055.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/fojenavuxesabojijuvog.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1613995742b4fc---89137859273.pdfIn PDF document text
    • https://geloracinta.com/contents/files/74699774638.pdfIn PDF document text
    • http://wmsone.com/eimages/file/44348280070.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/xozugosawe.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_off0000cf7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7E 11032 bytes
SHA-256: 399134fa61ba6ec786f0315c67850b92915ebe74e3173fcc2cd30eb0651cafdb
font_01_sfnt_off0000e90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001011e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011E 18192 bytes
SHA-256: 639e95a037a23a7ef749e4bcd2350b117a1cd060f7c8627ca7144f4f11ded9ef

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