Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3e111013910cd2…

MALICIOUS

PDF

108.0 KB Created: 2021-09-21 17:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d7edb66c1a265986205fb0962ad3046b SHA-1: f7e4dc0cec585d074235ab3a28aced25f2779c15 SHA-256: be3e111013910cd29d3fe0db22dd1754aad2b56e6b8452314e665d61ad6158a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://cncforginghammer.com/d/files/53033650090.pdf In PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16138aabb2d59d---xinefisovi.pdfIn PDF document text
    • http://123dvere.sk/files/file/fuvogojasegedogukufo.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/79386252367.pdfIn PDF document text
    • http://ocvitlucky.com/vietkiendo/upload/file/56787022459.pdfIn PDF document text
    • https://nada70.org/userfiles/file/25089742096.pdfIn PDF document text
    • https://kaparatt.com/images/File/89029254513.pdfIn PDF document text
    • http://hbtsap.com/Upfiles/news/file///52562379422.pdfIn PDF document text
    • https://derya.afmiletisimajansi.info/resimler/files/xomazikufa.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/19345028059.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/xonisezevof.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/cd14865f8587611fc3bae61eded990b1/ponawome.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/biresezudodudupebonopi.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/memafenevuvitakigo.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/sazakifuxabobop.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/85338291596.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/54638652002.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9e03d4ba6---68560274884.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/82975647230.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/powov.pdfIn PDF document text
    • http://www.s4b.nl/upload/files/27703028033.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/doduzemetutujurozutur.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1631310215_4c6c11a20b.pdfIn PDF document text
    • http://fullerton.kopanramen.com/uploads/files/90097248915.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=dragon+ball+z+kai+episode+11PDF 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_off00013ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000154b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154B3 20036 bytes
SHA-256: 114c6d09808a368f8320de4cf6543cf05e6e8cdd49f4fa8e2101a27847176380
font_02_sfnt_off0001896d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1896D 10816 bytes
SHA-256: b5107dca676026b838aae9852c141ba98b103591a998beccb93b899f7043f680

Open this report in the interactive analyzer, or submit your own file for analysis.