Malicious PDF — malware analysis report

Static analysis result for SHA-256 483f5bea0b0caf98…

MALICIOUS

PDF

71.5 KB Created: 2021-09-16 10:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: bb0987a63731c95d090ff3546880ccfd SHA-1: a7d1158543e71198c5d632866cb984e9a5990d03 SHA-256: 483f5bea0b0caf988bb62499ff22c8750d0976fdd4792c2ef7be09104f1bc7da
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The presence of external URIs and link farm heuristics points towards an attempt to lure users to malicious sites.

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 https://chcial.ru/uplcv?utm_term=eatmarna+app+download+for+android PDF link annotation
    • http://chokmanee.com/userfiles/file/41557848822.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f52235c57---32158320501.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/190506468.pdfIn PDF document text
    • http://hyundai-baoloc.com/luutru/files/83657283520.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/93866512863.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/66588448961.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/e290c876b066a10f9d0968a64f540faf/11523250981.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/30660043386.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2b60894ea---pukedaleta.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16142dd8fd28ad---zekeboxeniziwu.pdfIn PDF document text
    • http://craft-personal.de/userfiles/file/69365032143.pdfIn PDF document text
    • http://apartmany.cucoriedka.sk/data/files/zuzisiwamikumajowum.pdfIn PDF document text
    • http://wirtrauenuns.ch/images/file/48249107857.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/21801809923.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/62935049882.pdfIn PDF document text
    • http://jfe.hk/userfiles/lukoxaxida.pdfIn PDF document text
    • http://tzsunup.com/upload/38901103889.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/lufikojito.pdfIn PDF document text
    • https://ww150004.linebot.net/upfile/files/20210915160305.pdfIn PDF document text
    • https://tainandentist.com/uploads/files/202109151157199559.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/rivod.pdfIn PDF document text
    • http://zhongyuemedia.com/filespath/files/20210911192408.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612eff0488fea---20005593818.pdfIn PDF document text
    • http://fitviewer.info/files/file/rikosugobaj.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_off0000b6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF00 16396 bytes
SHA-256: 25aca8f08c679298831516a412eea41cabaff417ccc18cd631012e9bfa57a93d
font_02_sfnt_off0000f8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D1 10428 bytes
SHA-256: 05074c6d0c3cba5bc73fba3829cc079b43f3e00b417ab7706ec783782e561e57

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