Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b410bd235e730f…

MALICIOUS

PDF

69.6 KB Created: 2021-10-03 17:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 74db9fab28fac929f1060b0223fd6a9e SHA-1: a75d7b51260148a72a4fc4cb69908276afa764a7 SHA-256: 00b410bd235e730fdb281e6fde5bb1096638b50e1b91ba74f7f6db906c38188b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous URLs that point to potentially compromised or disposable hosting sites. The primary goal appears to be directing users to external resources, likely for malicious purposes such as credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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 http://ciarajewellery.com/editor_upload/file/68961441725.pdf In PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/roxowolivipujivar.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/69674692934.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/62086735058.pdfIn PDF document text
    • https://10fci.org/userfiles/file/52662305818.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613a911581aa9---wojiremakazefarozifozobu.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/zumeboxis.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/mudijivaforobixe.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/54348463422.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/87309642743.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/kigopomipigixatu.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/2021101053577461.pdfIn PDF document text
    • http://photo-poligrafic.ru/ckfinder/userfiles/files/45091418619.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d90f8db7e3---94174523938.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/98765735942.pdfIn PDF document text
    • http://gu-bo.cn/uploads/files/9617913615.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/491f3d11bfee9bda58bc87aaa0afc6c7/43832433141.pdfIn PDF document text
    • https://thietbixanh.net/uploads/files/15386001692.pdfIn PDF document text
    • http://saga.diamonds/uploads/ckfinder/files/43666332537.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=indian+polity+by+laxmikant+pdf+download+englishPDF 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_off0000ae32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE32 11332 bytes
SHA-256: bb028fb29d7b9174e497b12a94a024f565016e2e83a16ff70cc3c7f955fb91c6
font_01_sfnt_off0000c847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC847 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE059 15800 bytes
SHA-256: a5f520105b4f3373fb4139f100b7589ec6acca908fdc589cddf1a6a90c5bf1e3