Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4c70b3ff737474…

MALICIOUS

PDF

62.3 KB Created: 2021-09-27 03:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 49dd2bc1ef7c2bc1502fabc1b4e355c2 SHA-1: 895c325f09ed378da5f576f32ba08eed39ef1a54 SHA-256: 9f4c70b3ff7374748145474616974a92336fe6fcf5ed7da4b360d52e76d58631
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised or disposable hosting sites. The PDF document contains embedded URIs that redirect to external websites, suggesting an attempt to lead users to phishing or malware-hosting pages. No scripts were extracted, but the presence of multiple external links and the ClamAV detection strongly indicate a malicious intent, likely related to phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3678

Heuristics 5

  • 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
  • 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://oniceh.ru/uplcv?utm_term=the+amazing+spider+man+1+mobile PDF link annotation
    • http://musikpark-live.de/userfiles/file/masikipasozagekoma.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/vogixigifumexanani.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/39146250496.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/72006136708.pdfIn PDF document text
    • http://www.sauminandy.com/fckimages/file/53772962743.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/79813162755.pdfIn PDF document text
    • http://stevis.cz/files/file/xumerosegaxawuxutatezo.pdfIn PDF document text
    • https://matkinhantai.com/luutru/files/girune.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/16189571682.pdfIn PDF document text
    • http://quaisetoiles.fr/img_pages/file/12277830786.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/pijejasaviz.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/nefer.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/fb904c35d0e15c02c353e6c364a1a0bc/teropamafezaguzeb.pdfIn PDF document text
    • https://n-tlg.com/files/file/1599758089.pdfIn PDF document text
    • http://kezmosas.hu/files/file/91797566035.pdfIn PDF document text
    • https://giaphutelecom.com/tctt/sites/aaa/file/figalajifijerake.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/gakamapamofajaxojujo.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/mefonuwemudo.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/13248939422.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/72e30fe493ef1455a2afe021eeb372e0/74358365956.pdfIn PDF document text
    • http://newcityhk.com/userfiles/96307938871.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/3568931753.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/720a91a7365205ea67d9c30b7a598cfb/xodufubutetutu.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20210916_6789A109F940D9DA.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/buwejewesavemonu.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/zivufevogovodokaxibobewe.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E0 10956 bytes
SHA-256: e30923de109c5f6ecf32f2c38e69b094ab4f97cd207c22e22ae520f08efd5cf9
font_01_sfnt_off0000c9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1