Malicious PDF — malware analysis report

Static analysis result for SHA-256 c012ca3169ec5d80…

MALICIOUS

PDF

68.8 KB Created: 2021-09-11 22:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 80bbff43e6cb9e920bbfb998dd4db6ee SHA-1: 0f56e2de752fbbba2246e742fe99374868e63abc SHA-256: c012ca3169ec5d80225a9c8c617dae13ca222d3a2ecce718b1fab41b08f3aaec
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a deliberate attempt to create a link farm. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://alebusph.centralcms.cloud/galeria/files/63004923847.pdf In PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/161384a5b91fdd---bifebekijejelunusu.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16131b81e052f1---genosuzudusawegimorubosag.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/jexevude.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/razofuxazamebenut.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/tolasanefojane.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/3337845854.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/muzoresiwuwepifil.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/xatutejorebizepo.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613495d7a930f---xipuxifaxamezapo.pdfIn PDF document text
    • http://hexindechem.com/upload/files/51751151780.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/74109000743.pdfIn PDF document text
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/26211249607.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613104b5d4054---89613834098.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/202195257359264.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/12240806567.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/62ef27b4dc121f01ce4ee330a43c8c3d/42457658793.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161379725f41ae---wuvegarabajit.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/40414872801.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/rafumejirilibedimulax.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/naxesuwirerewujikaparar.pdfIn PDF document text
    • https://digireg.ch/upload/sovudexasu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=power+amp+download+free+androidPDF link annotation
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/mixezurekiduvunu.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_off0000b21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB21D 10480 bytes
SHA-256: b68f0c361a04fbe61cbf7c976eef93497bae02a8fc02c31e9fc6a62340cc05b6
font_01_sfnt_off0000c9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F3 14168 bytes
SHA-256: d69dc90884f88d88806ebfb450817301e2d49621ab7ebabb715f75f5adcba414

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