Malicious PDF — malware analysis report

Static analysis result for SHA-256 973f784f00dfdaef…

MALICIOUS

PDF

100.6 KB Created: 2021-09-07 06:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 85eed27f0b37d4ae3c246185843ba72d SHA-1: 7160fe45afac093cbbd94e91ce1fea6a90eec6a9 SHA-256: 973f784f00dfdaef9add9f0b5641802c144ce724d1140d7fb1ace6c00b2212cc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple domains, some of which appear to be compromised or disposable, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous external links and the overall structure point towards a phishing lure designed to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • 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.
  • 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://aotwresort.info/ckfinder/userfiles/files/wulofosodavixomuwofofawuv.pdf In PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/zituti.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612573c28ac31---540878166.pdfIn PDF document text
    • http://songiadabinhphuoc.com/upload/ck/files/79772526597.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/sajoposidi.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210824070418.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210803_C05B469457BC1E96.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160c56775bd22a---72304946161.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160750a4f32e81---94098398331.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/40774618860.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607926b06dafb---viwixat.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/96353051629.pdfIn PDF document text
    • http://pekbdt.com/filespath/files/20210819132534.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/94546472614.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/8lsl9fost7h05qeeqcalp0t012/vobirikone.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/pimejiwotitig.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/lovoneranagorabajenego.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/xetorebakirofutaraki.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/lprve528tjeedgq0qbrslkqtvr/72315827265.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/6r6js5ku3p9tst66hup62p5ald/lovalazazatobiruxatu.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/budanezeziri.pdfIn PDF document text
    • http://weymouthhighschoolclassof62.com/clients/5/50/50fe23896e84432c97ff20d680692bb9/File/3741189947.pdfIn PDF document text
    • http://esistore.be/userfiles/file/24233012302.pdfIn PDF document text
    • http://foodsaver.nl/app/webroot/files/userfiles/files/wuwage.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=perspectives+in+education+telugu+academy+books+pdfPDF 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_off00011370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11370 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B82 23876 bytes
SHA-256: 92d984c90b9506a92e560363cb9b243de21dc546559b32cc0fc3858da313e620
font_02_sfnt_off00016972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16972 11476 bytes
SHA-256: 4d92394fbbe0b948c85736cfca9537e4da2d6c274422dfa1d879d76a72a2dd61

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