Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd364ace6202d362…

MALICIOUS

PDF

87.7 KB Created: 2021-07-22 08:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7cfe72de022e1f2ad795b481e6e85ca7 SHA-1: c1c899f7b5747e962af68c3d92ae09e01a714f1b SHA-256: dd364ace6202d36217b300289be2b1f998a537d337c03a3646ecb6602fc6bfab
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites. This suggests the document is designed to redirect users to malicious or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://petikdaun.com/contents//files/belepufowexo.pdf
    • https://metricgroup.it/uploads/file/86718238638.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/c5a26527cc3493e4fef3f2526a21346a/53362691425.pdf
    • https://observatoire-omic.org/documents/file/95206657806.pdf
    • http://m2mus.pro/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/92289951190.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/0b079372a41a0887284f25fc0e8205a5/73995986461.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f31bb9f9dd---zexuwobewevuwo.pdf
    • https://digicpictures.com/downloads/71770905081.pdf
    • http://rasciindia.com/firetech/ckupload/files/37990975874.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/a432618e896f958c60afddc098b0dfd3/3291102492.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/qjfideld2qku7v7vpv6nfi357n/kikenekuzazezaxonisiku.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/rthk2s26m2m95rtii46fvkvo0k/ginejuwelinetosopiviw.pdf
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/xuwugesenojenavefaku.pdf
    • http://cardealer-space.com/js/upload/files/23861528559.pdf
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/b3433f8c3fa788e4a3ef9cb5c53500f3/98705139025.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/073ca6ef152dc4a5fa083203aff05ba5/majoj.pdf
    • https://pmms-online.com/assets/file/tudivigu.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/54905d8c3d695dc9e62f0e622586b5e3/gerovidegaramosutomewe.pdf
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/682d5028b9c8c036c8c8687bc94fe68a/loduzoriromofavapinus.pdf
    • http://ruresept.ru/files/file/64389000699.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c054c0adf90---zofasil.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608697cb279b2---kesunobufoduwemi.pdf
    • http://espacioschillout.es/images/admin/file/xidojazoduligabofab.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=decision+tree+exam+questions+and+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ce.bin
a18489b76a388fcae1c24e8800f1e9246e2d577f554ced0e204273944b3cc096
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CE 17152 bytes
font_01_sfnt_off00011ea2.bin
7a737ae906cc09c05d2495888538a9c3d8720f41ba056dbbcfe94fe89e3c32dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA2 10920 bytes
font_02_sfnt_off000137d6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x137D6 16792 bytes