Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f2dffd42b4c2cc…

MALICIOUS

PDF

87.4 KB Created: 2021-08-09 23:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b8b7eda0eb44ce6360f0081b1987d38d SHA-1: 6be31e740499937c955c1f1f560258e4cfd0b245 SHA-256: 20f2dffd42b4c2ccddc608942552b0e53d0fadb690349043484f1f0452eee59f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a URL with 'toomics free vip membership hack apk' in its query parameters further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf36c747f---67816487379.pdf In PDF document text
    • https://rewaqousha.net/userfiles/files/punivomiviniruz.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0095a7a05a---28832918748.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/6480e6d8400837b1aad9182a8cd07489/nozaxufeboteru.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/juraze.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/k8huga6qt71qhf4fdf6mpo6u78/96877161203.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/13895167568.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5671476181.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/1f2e023489fddb136d3a3e0e9971e612/49315532547.pdfIn PDF document text
    • http://ckpak.com/fckeditor/userfiles/file/64910298221.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/3p8fbvgdf755ik6ks89b3lmq88/58145439283.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94cac8c829---widamupadibi.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddf5fd66ea---88812205.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/25734965976.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/11c9a965af119179f3f4946b27f158a0/tipenedikamagukulobizax.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/39739292571.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/tudugu.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/vorazenof.pdfIn PDF document text
    • https://parfumzone.ro/files/file/mivemubimibusosiperov.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/wojik.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/32363679849.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-7-10/20210710170041804874.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/66997974703.pdfIn PDF document text
    • http://harrisonsfamilyreunion.com/clients/62911/File/70231028407.pdfIn PDF document text
    • http://irollee.com/userfiles/file/tumavonenuditapoxurefof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=toomics+free+vip+membership+hack+apkPDF 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_off0000f3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BD 10756 bytes
SHA-256: d7e4ab9e57e8bf874812ff04b003f049a80b3d35d2b7e2c122bcefd675c08887
font_01_sfnt_off00010c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001245d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245D 16764 bytes
SHA-256: cdb334e9265c3841f64ed1eecc392d7082295afe6702e978265fea99ca012c7f

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