Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eae7107592fa7ef…

MALICIOUS

PDF

88.4 KB Created: 2021-10-10 07:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5bb9011a79981d2865760980a36eaf2d SHA-1: 3101a20172e4a0fcc3b1615e8e23c49b5ca6fe21 SHA-256: 0eae7107592fa7efb6eaa976ee7a722e049540c0642085704b2ff7703008c674
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or SEO poisoning attack. The document body is heavily obfuscated and unreadable, providing no direct user-facing content but the presence of these links indicates an attempt to redirect users to malicious or compromised destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/39519962304.pdf In PDF document text
    • http://kunjipsc.com/uploads/files/gutikutatimefanex.pdfIn PDF document text
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/85199961372.pdfIn PDF document text
    • https://datenglagi.com/contents/files/mubuwowutumuzek.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1616243dde0373---fotafebuduvusopebojaviz.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c9c36b3748---kudoluzitar.pdfIn PDF document text
    • http://congress.bpv.su/content/files/files/vileguvoziraxiduvori.pdfIn PDF document text
    • http://suachuamaydemtien.biz/userfiles/file/20887491733.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/210911105643273555mhmdx.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202110050021597433.pdfIn PDF document text
    • http://master-br.ru/img/file/15990044621.pdfIn PDF document text
    • http://dmychadla.eu/UserFiles/File/21978042094.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/30554060254.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/4735163346.pdfIn PDF document text
    • http://www.pilartangguh.com/file/koretojaga.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/nesifigujas.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/40532248323.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616146271ba9f---96557923682.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/fugoxuvurimajasi.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/33358655747.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/baborixuwuwuzedowedoz.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/554180695.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/53033900822.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/gesapewoxotabip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=blinded+by+the+light+bruce+springsteen+meaningPDF 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_off0000f078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF078 19200 bytes
SHA-256: 280a64a7d4aed1d7362acf0a84be2ad338435a5a3f34593bf64577bc5ddbd9cd
font_01_sfnt_off000121f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0A 11248 bytes
SHA-256: 9e3ab84ee1a89398fed569f877b967989d848ff1ccff8c8bbd85a395fd9c02fe