Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0e6ed139fd6ae2…

MALICIOUS

PDF

96.1 KB Created: 2021-08-14 11:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: b82b62a01219889cb4aa1a71b8a39ab6 SHA-1: 7d9feb4adcfe727bb3ddf66d5047260c66d4a12f SHA-256: 9b0e6ed139fd6ae21956da83dc4940c751e45b5423e7cdf6096439920a844965
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for requesting recovery secrets or private keys, indicating a phishing attempt. It also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised or disposable hosting, suggesting a distribution mechanism for malicious content. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics strongly suggest an intent to deceive users into divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://sva-jeanroze.com/xmedia/file/riwipogeworazel.pdf In PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be83a2b121---29159209285.pdfIn PDF document text
    • https://nada70.org/userfiles/file/63847774106.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/wisibomewim.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/61192643306.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/47890193662.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-1/20210501125820689553.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/622217c3f2746b9944901804289cb77a/xapikakuxupolulutuzejawu.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/fekufegejuputamed.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6a8713787---kupegirizifolexo.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160f1738438e09---lefuzowuw.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/b4l8pudviq65oeonvd9sv33776/kumegerezoresar.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/12cabfd42e33b50d9ae43285f3569d2d/kepuxavisuwapexajixaxaze.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d4c601ecc---79107226328.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740bb86afb1---suzibajilolufejixiwif.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/19267230860.pdfIn PDF document text
    • http://gazetavk.ru/img/file/lukogevanano.pdfIn PDF document text
    • http://allasclub.com/campannas/file/xafosi.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/80688675125.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/tepugigunesetu.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/feluwuwagufijovowom.pdfIn PDF document text
    • http://grhs1983.com/clients/72571/File/sunovinuwuze.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b538e3578---92597997232.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1628455136.pdfIn PDF document text
    • https://hgb.se/filer/file/vusegofenilijoripumewegak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=tamil+typing+practice+book+pdf+free+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://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_off00011232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11232 11188 bytes
SHA-256: 74f04f4e5b2a27bd350ea67b63c48d3421daccffb6313575626ec6c0e1d84465
font_01_sfnt_off00012bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001440f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1440F 17752 bytes
SHA-256: 231a27a632a955424fd06376cdd5346b79246f6f3e71913e031d924d78b3a281