Malicious PDF — malware analysis report

Static analysis result for SHA-256 262d737fd9954990…

MALICIOUS

PDF

77.5 KB Created: 2021-06-23 13:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e5b6d440ddae12f09b614d925bcc52f6 SHA-1: f56aa4bcfb9859f73918d2d1aece2eed90f826d4 SHA-256: 262d737fd99549908682bf27ff0f101fbcb7e6087b79d1c453cf8976d50424ac
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript, which is a common technique for delivering malicious payloads. The heuristics indicate that the PDF acts as a link farm, directing users to compromised WordPress uploads and disposable hosting sites, likely to download further malware. The ML classifier and ClamAV detection strongly suggest malicious intent, with the embedded JavaScript likely responsible for executing the exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soyana.de/js/ckfinder/userfiles/files/manubawotot.pdf In PDF document text
    • http://intergeored.com/upload/File/biwekamevekakod.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcc6645750---9099956578.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dc08346f1---86212817281.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/78538093866.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c44bedda43b---13039575753.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/jokasowabapawubuvewet.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/sapulav.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c4bb42cfb---59279810587.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/j9nb7fas3j5nncodhsf8i6l4d5/fanubuwumaronu.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee091033c3---24702920546.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210513123538085095cgt580.pdfIn PDF document text
    • http://bean2beenefamilytree.com/clients/60578/File/kiziro.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/10054537329.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fce6a1220a---58343986614.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/e6ae4c8214d532e2692e0f307456a143/40322629123.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160982e5c5d2cb---xuvukavaxop.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fdb5c145d---35344242860.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/rc4md87220vuk60o19b0p1mro6/juvitix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=panasonic+lumix+dmc+lx7+manual+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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 5228 bytes
SHA-256: 2cc7353e29d5834dc9a7f9c6b95687b842d03d5b73204d66cadacebf6a6add91
font_01_sfnt_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 10744 bytes
SHA-256: 5721d8f5e77411dfc39ad9c26e51856746068cca8532baeee4c8a90b55849694

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