Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fbdeb99405bf996…

MALICIOUS

PDF

111.4 KB Created: 2021-09-09 22:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 36bfc5cf2bfd9f1e33bb3cb7ca16ab43 SHA-1: a65e68e84e780657b99ac79032b1826eb71a8c4e SHA-256: 0fbdeb99405bf996527760c917bc10ab2cde7b854c4960406fac64a7d871cdf8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9873

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://cructi.ru/uplcv?utm_term=goku+dragonball+evolution PDF link annotation
    • http://3asoft.vn/img/files/nevujexasus.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/33735434150.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/85419208595.pdfIn PDF document text
    • http://packagingandfoodmachinary.com/userfiles/file/duderufojimemujureseto.pdfIn PDF document text
    • https://anzhero-sudzhensk.verlauf-ekb.ru/admin/ckfinder/userfiles/files/rakapin.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/dejomulepa.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/99721186944.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/ridijatoso.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/63170784315.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/93492128456.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379d1713f51---mulopixazinevagog.pdfIn PDF document text
    • https://bocrangsuthammy.vn/upload/files/6960527166.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/90399181534.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/22920865331.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/jupopewapajudowaxe.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16130af6cd783b---vurafapolixujot.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/woxanatuwirapos.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/3734230075.pdfIn PDF document text
    • http://qwerty.pl/_data/file/77328962454.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/rafazonusawoduxova.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/91153774428.pdfIn PDF document text
    • http://locum-system.pl/userfiles/file/24248793179.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/36414370165.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/22612840040.pdfIn PDF document text
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/12907885289.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130f6d6eda1a---85776956597.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_off000148d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000160e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160E4 19960 bytes
SHA-256: 92f52ab20a2f26ca09bbb9bfdd60a6aff940278e16ac4ee5f4afae0466390124
font_02_sfnt_off000195b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195B7 10692 bytes
SHA-256: 69f76379a281309f6e126060a6c757da9734996776e1a2a3a5e97a89830d9c7c

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