Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19b8e18af54396f…

MALICIOUS

PDF

405.4 KB Created: 2021-07-24 14:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 12d7f722180f07b5f631bc1912abee1e SHA-1: 3b6cf2d163a8b4d5f48dbf97fe5e0ee5a66e2459 SHA-256: a19b8e18af54396f257507f5d798b51567d185c2914546104f5ad3393f71f3e4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristics reveal that the document contains a link farm pointing to compromised WordPress upload storage, suggesting it is designed to host and distribute malicious files. The presence of a visual download button further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8427

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://visit-pune.com/userfiles/file/guvabagunuwo.pdf In PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/fd06bd5e66df72cf36e484006d38c8d2/vawenejuvogafumi.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/mibabixokomelakerurogejik.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/rejolaginoti.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/99402086656.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c5167ba28ee---66260755026.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ed271c224---guwosopibunujuxodiwixat.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/zunugadeparerupegeme.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/jdui65rbk496scu3r2gpn1f392/93879370834.pdfIn PDF document text
    • http://starsunited.at/upload/files/zoxuvoregokuxidima.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/bhbb0pmb8pvbpif934u7u906pd/tefaxuwobiv.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/rifinerazudig.pdfIn PDF document text
    • http://ladue69.com/clients/876446/File/jinuwixun.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/55820464284.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/limijuzajon.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/5ippqsch3v4575ooe6v12vf752/sazidozemoxeriza.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608504b403771---bevuzoludakudu.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/glfrjkquvfmjpn651bk2nccto0/14878478231.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce3cce9b69---pipozuvi.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/paxeva.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/41698506170.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1608e930e8f31d---33249286983.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/21990893805.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c078459745---57053985155.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/143327a035f22ebdee519828057c2a96/lixelenumozi.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210531125817_1166229009.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=cat+planet+cuties+season+1+episode+1+facebookPDF link annotation
    • 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_off0005dfd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFD5 19940 bytes
SHA-256: a2b707187293ff5c06ae82f650b158b1129c7dec0ddc0913873ea6ec6c6e889b
font_01_sfnt_off00061391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61391 10928 bytes
SHA-256: a46ece482edf54768017785dc321bbb2e41d34c4596e0799232bc0f191b10396
font_02_sfnt_off00062cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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