Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2215cdbb470ed1b…

MALICIOUS

PDF

129.1 KB Created: 2021-09-07 18:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 3e6dc95f6f9e69fc1bda4565b7b540c4 SHA-1: e597fb8c939476ce5adbe7622210f601b0cb3285 SHA-256: c2215cdbb470ed1bcc3929df6ae18087fa52ad0465dab35383826372ec5a963a
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, designed to redirect users to download further malicious content. The presence of PRC/3D content and embedded URLs suggests an attempt to exploit PDF viewers or trick users into interacting with malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 8

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://ketchas.ru/uplcv?utm_term=administracion+de+empresas+tesis+pdf PDF link annotation
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612ce44e2f4c0---gawejabatopexaxigome.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210513024422_1423375405.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/nekanas.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/d9dlvspc5qlubfh6np06siruj2/tawoboxudodidevotedo.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b441d41ef1e---valujiwalixowabemezexade.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/b495d54c1f9c57b9fca10a7fdfeb68f1/wozetufit.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092eb26e3197---21944319320.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1621843940.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/iaakd51pltnp2k2gct9msd3p32/dafetifutopitegira.pdfIn PDF document text
    • http://akhsmombasa.com/clients/861898/File/91626669358.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/lajilugopujugomagajonas.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/11648956154.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/68440144934.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4cd56c1b2---89765780697.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/68543156326.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/nediwufebajujat.pdfIn PDF document text
    • https://efsanepin.com/calisma2/files/uploads/76400171889.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210720010224_2104121150.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608192c6aaf02---36702715189.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1e561758be56d9d0ab9032111fe518e1/risodifanizarijagumivumew.pdfIn PDF document text
    • http://developmentassociationofnagaland.org/nbloom/fckuploads/file/76973369085.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a90a3bf39d5---voxeloliv.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/d95436biecqlamlrh366cj9jk0/waxuzepudexumosekilasak.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/nagupevaxavinororad.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_off00018fa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FA3 10716 bytes
SHA-256: ef932d144e5290cebba7aa4d0f7b64254468c93a8611314854bf4cdb1bfbec14
font_01_sfnt_off0001a83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A83B 21508 bytes
SHA-256: ff13c7f61cff1af657968e16aa229ec8ea9a1e127d0f33919c6dd77aed9f1d78
font_02_sfnt_off0001de25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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