Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e09e5fb78977157…

MALICIOUS

PDF

78.0 KB Created: 2021-09-13 17:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 337348dbd70d31437671f9a32949a1fc SHA-1: 3ce30fcf422c9e5cad095635de79565a5c9a3fcf SHA-256: 6e09e5fb78977157fcda1b8d0499224b5ed74a4591881833f186eeb1899b2f97
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it contains a link farm pointing to compromised CMS upload storage, specifically WordPress instances. These links are likely intended to host or redirect to malicious content, such as phishing pages or malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353aa2cb0ad---mupavetesokilek.pdf In PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/161302f35075fb---82480111848.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/78839789127.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/vesiganipafowawadoloj.pdfIn PDF document text
    • https://graphicart.ro/fckfiles/file/vodefajikamizuj.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161312b12053cc---40877544456.pdfIn PDF document text
    • http://newcityhk.com/userfiles/bixogotuvuwigibilokov.pdfIn PDF document text
    • http://3sdent.com/upload/files/kejekijin.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/filun.pdfIn PDF document text
    • https://menu2uplus.com/images/file/patera.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/todurazetazijumawe.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/40386708086.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1631539137.pdfIn PDF document text
    • http://safarekhoob.ir/basefile/safarekhoobir/files/47028253062.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/9021030143.pdfIn PDF document text
    • https://mackbeks.com/files/file/6211569967.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/vonijusodemoxeze.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/40186052298.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/julezaxo.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/zivomamaja.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/fowozipegekeza.pdfIn PDF document text
    • http://keemunblacktea.cn/uploads/file/011425022299.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/sorolewa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=new+york+2009+torrentPDF 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_off0000cbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D2 17688 bytes
SHA-256: aa7e574182a8c72cb824f6dd2a22233ccc9b2dabfbec3537ee82979ce6c2e189
font_02_sfnt_off000111dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DC 10312 bytes
SHA-256: aa0834090ac4fe2e1f75a6176234677950b9020500841609819be35ec4142406