Malicious PDF — malware analysis report

Static analysis result for SHA-256 9630204ba52b523c…

MALICIOUS

PDF

91.1 KB Created: 2021-09-13 04:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a74dd86f0df39b95cdd9251df06a091d SHA-1: d2f9fbbf01c9865aae329e03aeaa6e4ba0a956ab SHA-256: 9630204ba52b523c4f328b3d6ad01ca143994ca480d92288e35ef118d231b95b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farms pointing to various domains, suggesting an attempt to redirect users to phishing or malware hosting sites. The presence of embedded JavaScript further supports the possibility of malicious code execution within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://nomylo.ru/uplcv?utm_term=best+mobile+phone+company+in+pakistan PDF link annotation
    • http://zhongguohuachun.com/d/files/14182970026.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/tikifuxonivezirilunuveked.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/22291405104.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/71069627157.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/siduzafovejusapot.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/fojakik.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/rofazisa.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d410d5f150---puwinemojenatugonubawepu.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/54654385782.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1cede4fa2---3921623408.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/manoremogovexisunilofu.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/bumuzakirovoropodaganax.pdfIn PDF document text
    • https://raptiherbal.com/ckfinder/userfiles/files/86981043072.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/20826384813.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/18112691914.pdfIn PDF document text
    • http://mos-craciun-inchiriere.ro/fckfiles/file/kedizofijuvaditokewu.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/48291819752.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16133f9d188656---kenaxelujubavor.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/39376737279.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f77ed3f2f9---joxekegaxa.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/20669251240.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/doragosimopiviket.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/6236900658.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/55d904170803ba2566dcc9004212d941/4088100209.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/zogufaxuxarawenegibafakax.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_off0000fe13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE13 18252 bytes
SHA-256: 332f3bf65dc7050716c9a90c18f09c2b5f515738c1d2d68151af1dc4e2647bb4
font_01_sfnt_off00012d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D33 10940 bytes
SHA-256: 24aed443420b7fb3a428c3ee287c05eb3630861153a9fcf2ce78a87c998af71d
font_02_sfnt_off00014637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14637 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1