Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed1c514426f1d24…

MALICIOUS

PDF

73.7 KB Created: 2021-09-25 14:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bd159356f7bd2aa2edab6186e3e39c76 SHA-1: e3ce0343d0df13e45a9370847cc088eff8919fa9 SHA-256: eed1c514426f1d2495c3bb39b2f4a066a0b853638959888ec7075221f065524d
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised WordPress sites acting as a link farm. The ML classifier strongly indicated maliciousness, and the presence of a JavaScript stream suggests it is used to facilitate the download or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

Heuristics 6

  • 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://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1614e2be0df35f---tasuwopevepofizis.pdf In PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313503f1f7a---92806322229.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/kupeju.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/wejafodojetakilo.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/kezelosuzodet.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/e36cb0c86f56ac4675b53de189524525/babomakizi.pdfIn PDF document text
    • http://szolnokepul.hu/userfiles/file/jafugajobakiniwusuna.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/datofusem.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/muworutavuxogove.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46035600509.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/xowukinupodituluwekibiju.pdfIn PDF document text
    • http://allergya.news-read.com/upload/files/1246331031.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/23907515127.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140d649dcb38---20431733883.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/vujaluvisubemute.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/ah0d95oeleeobva2k1fusbb6uh/kiwida.pdfIn PDF document text
    • http://greenbrier101.com/userimages/bejetasibipojifosafi.pdfIn PDF document text
    • http://sanxuatbanthinghiem.org/app/webroot/uploads/files/xifigeriretevokaturili.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/tunozomutaxazozexe.pdfIn PDF document text
    • http://dnt-mayak.ru/content/File/12346121935.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/torobukaresos.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/moxodigame.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/41623568787.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/80587693790.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/72276966088.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/85934566770.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+legend+of+zelda+ocarina+of+time+n64+downloadPDF 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_off0000b91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB91D 11108 bytes
SHA-256: 8ac4db827cb29bff0d2990511b10c9777f1ac8c3521cd0af62938ec481bedec0
font_01_sfnt_off0000d2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C7 18140 bytes
SHA-256: 8dde32989fcf559a661849523597e0bcbb0fd43d772dee9f53782524d9473f65
font_02_sfnt_off00010098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10098 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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