Malicious PDF — malware analysis report

Static analysis result for SHA-256 0deeb6c35bd331a9…

MALICIOUS

PDF

86.9 KB Created: 2021-08-25 19:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bfcd48e2dc1fa02109bbfdfed08ce9a1 SHA-1: a3dd5c121abdf3844d003db2a0843e27998814a9 SHA-256: 0deeb6c35bd331a9332369f9694e64c7461f3583dfedc05f4fae81b42df3bbca
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is identified as a link farm, with many pointing to compromised WordPress sites. The embedded JavaScript stream and ClamAV detection further indicate malicious intent, likely to redirect users to phishing or malware hosting sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/uplcv?utm_term=nora+fatehi+sexy+pictures PDF link annotation
    • http://clair-environnement.eu/catalogue_dynamique/file/zokavezoguwugaxaruzoj.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b967906b9b8---zobekukumup.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/45400383339.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/pipuvowemukipetaf.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/859544515.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/winomejub.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/ropivisug.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/b68e3c882adee52e8bdd5c8744aea785/30747328358.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/jujomajo.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/36250511641.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160933745143b4---12235214244.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b6aa6fce8dc---25137466522.pdfIn PDF document text
    • https://egca.fr/userfiles/file/78582841019.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xuditelosubonudojuri.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/linisoziwerod.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/guputenuxirudixezorumox.pdfIn PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/pinivepumibofujurozobe.pdfIn PDF document text
    • https://aashianarealty.com/file/wexinonasiwobefixuvaselu.pdfIn PDF document text
    • http://korytnica.net/data/files/87615469391.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/7e4704da332e48491144ef6b463c6984/bajivesewezosa.pdfIn PDF document text
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/56421660034.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/1njq12u8qai79qjaukfeoevdv7/nagolipisozubasexapiz.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746753c2f85---883072707.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/22510012761.pdfIn PDF document text
    • https://podimercrm.com/img/files/77400062122.pdfIn PDF document text
    • http://s-moonlight.com/CKEdit/upload/files/dekisazedumeroran.pdfIn PDF document text
    • http://arndt-fahrschule.de/userfiles/file/linenabafofegezoradejego.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_off0000ed11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 10720 bytes
SHA-256: 3c1d19e41b0c9caa28305e657af454a9d721da0c44152ffd7e9398b2efee92b1
font_01_sfnt_off000105ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E00 17344 bytes
SHA-256: aae83d5106c3c583ca75eb161cf3a0915b2a8ac48c4ed35f3fe2ca637cda19ba