Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab0ac713aa00894…

MALICIOUS

PDF

84.9 KB Created: 2021-06-28 00:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce708e26ef3ba9a9522abab8d0d39c4e SHA-1: abb58b1a56d41fbebe6e38a44ee0d0b60de4d366 SHA-256: bab0ac713aa00894ad4c4a432b0f979951b6c16537e2cc21a16d39c5cc27b335
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple disposable domains, a common tactic for distributing malware or conducting phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://firewheels.pe/userfiles/file/34772792880.pdf
    • https://taperagi.com/contents//files/42073990586.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/c370f15d3bdc30e9f8567d3b9d79a99d/34845781310.pdf
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/sufematunifixiv.pdf
    • http://originalcheck.it/public/img_admin/file///56714737418.pdf
    • http://mvhs1964.com/clients/2/20/2030ff4f331b14c2016b95997514b7ac/File/49393719512.pdf
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/691993328215daa502b9fafa5a35320c/30891517505.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/4438862836b7d371450f508b0f87e9fa/92141592047.pdf
    • http://ukrainski-rosyjski.pl/userfiles/file/sidanisiwezijezurabaki.pdf
    • https://gtselect.fr/ckfinder/userfiles/files/58740231608.pdf
    • http://musiclivemarsala.com/userfiles/files/verib.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/ed1614f69c37e3bff6ea490fe48883fe/82883612197.pdf
    • http://changwontour.kr/FileData/ckfinder/files/20210619_D7D2A55F0B9CB874.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/0c9cf41425e42b5ada0dc410e9a62421/xisusurufig.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/4ec76eeabc733b8a471cee5cca93b322/59513102469.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850a19669e2---wajuwu.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160762ecd858d6---66085704100.pdf
    • https://alshamiltrading.com/alshamilfiles/file/fisabanava.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c14dd988c5---45199480394.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/tff3qe1uif41kvuak403ve8dl1/jolasemexurel.pdf
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/vanoleninapor.pdf
    • http://acpiindia.com/userfiles/file/lujafazaropesofibe.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/o1ki4qjf4f8lr1natvo2t4r803/76272055609.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/sfacs63stbvme4ht7ai2knsorn/11871774235.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=download+song+girl+on+fire+by+alicia+keys
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e225.bin
52ce8a4c718931c5974ec02346ed42032b1c61ad78d648491d6f8e880b9a94f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE225 18324 bytes
font_01_sfnt_off000112aa.bin
7351c77c0d466058e9341bd1213880fcfae37a347ddf44ae66fa378619a2a2c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x112AA 10984 bytes
font_02_sfnt_off00012c26.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C26 16792 bytes