Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd331494a9ee1d23…

MALICIOUS

PDF

84.8 KB Created: 2021-09-19 04:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 73b181af222b6e639285627f16ca9895 SHA-1: 6d30b38911714fef03113e14ffe2c7682e3814d1 SHA-256: dd331494a9ee1d233a5b05da0bb2246804a712b7414e9444bd860568dab8447c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are associated with link farms and compromised content management systems. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful 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://drafthe.ru/uplcv?utm_term=powerful+words+that+start+with+r PDF link annotation
    • http://bibikid.ru/upload/60131074796.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16144b157a5c92---durinaderiluvomelu.pdfIn PDF document text
    • http://nincity.de/inline/file/24488357630.pdfIn PDF document text
    • https://blugarden.eu/file/busazemadalokobidezatole.pdfIn PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/15141431366.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/janorupafuwizuxewogolus.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/79048485676.pdfIn PDF document text
    • http://gesgo.de/userfiles/file/422597739.pdfIn PDF document text
    • http://kavtas.com/images_upload/files/juwerenex.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/kexubajugavixuduwin.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109021658101834.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/gugazumupufokirisijun.pdfIn PDF document text
    • https://tennis-samara.ru/img/file/sijulid.pdfIn PDF document text
    • http://odessawa.com/userfiles/file/gemelizazekiw.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/bufavenozareguzumexag.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/lqdtqfke292nf8vnk72f9c1od0/90096427221.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303f5eb1d40---dijubilufaxube.pdfIn PDF document text
    • http://vrzion.com/data/userfiles/files/65486237143.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/jivijokuniseliwubipapi.pdfIn PDF document text
    • https://dsverano.com/UserFiles/File/kuwud.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/vonojotuxukibem.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/70310003405.pdfIn PDF document text
    • http://sukhonthip.com/file_media/file_image/file/pebovikaneb.pdfIn PDF document text
    • http://fruitvita.com/files/files/54648956086.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/jovawi.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_off0000e79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79E 17976 bytes
SHA-256: 73d5df7186fc001b685970782af536ce9e0064c03c3dd50a803133aa6deb5287
font_01_sfnt_off00011561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11561 10536 bytes
SHA-256: d86d4fbb51541c2ba939cd2168499d66859009f3e1449b49cbcd766bb3b1f0da
font_02_sfnt_off00012d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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