Malicious PDF — malware analysis report

Static analysis result for SHA-256 45401f4d7e37d7f2…

MALICIOUS

PDF

84.5 KB Created: 2021-07-03 01:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b5a7e89b430697c843034d73c0302c87 SHA-1: b01283d62147f9baf71353b4bd8d7d8aa203d20b SHA-256: 45401f4d7e37d7f2f7dca4341d051730adefa454f515c588683f68cf54813212
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The presence of embedded URLs and the nature of the heuristics suggest the PDF is designed to lure users into clicking malicious links, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf4c5b4e58---pulado.pdf In PDF document text
    • http://gmicropilotes.com/uploads/files/66790086081.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/29468611458.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/rguqa04p1p9t723qeo96f3jgbu/boguja.pdfIn PDF document text
    • http://carszana.com/image/upload/File/nikinigafiw.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/32608566084.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d26edfc9b03---timisowodufalukafumew.pdfIn PDF document text
    • http://euro-ex.com/images/blog//file/51625702025.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc8567de2a---nuxepomezilup.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/96014154270.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/18061235670.pdfIn PDF document text
    • http://tomlitkom.ru/ckfinder/userfiles/files/lasulodagobevibinif.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/fb71c21fc4fe4ffc4bc4939a551f589e/tizopejazup.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/f08fcec91ebd514de622b6725f965a06/setopizavapipipewunakil.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befbb066028---kepujabufojupole.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092dc4a1515f---81492825376.pdfIn PDF document text
    • https://proxus.nl/file/53319459049.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/ac87de1d8dfc22432802f4e21a323000/dadiwuwulolinidek.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/4c918f2de1d0c6ea9d206800422141c6/gobotepisur.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921e8368117---muwunajop.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210621_2DD36D6FD76B155D.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/47mus7lnj823ci5umo67tu62vr/43139154764.pdfIn PDF document text
    • http://bhsclassof70.com/clients/a/ac/acf0241a72c9eb28a719a759cf8a4748/File/24268794955.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+find+out+nth+termPDF 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_off0000e787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE787 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9E 10420 bytes
SHA-256: 0a9387b6dcfe87b3294131de45ef0dfb7a7a7341baaba8409b52271f31eb702a
font_02_sfnt_off000116fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FE 17564 bytes
SHA-256: 8af8a5e133b7f379218e68aeb46c1974ea394ff2f23b4aa437ec78eb7e98760f

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