Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0dd25ba8589e7a8…

MALICIOUS

PDF

85.2 KB Created: 2021-08-19 11:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 013665cd7f39c28a8002057633130bf0 SHA-1: cee0914d796924e0bdd5cb7c317cefd926b5ff3f SHA-256: f0dd25ba8589e7a85ee0e19391e7b6a691a52fcb8943954e52b94f6207b82bd0
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://saltyfeelings.com/userfiles/file/lemuwiru.pdf In PDF document text
    • http://vdi.vn/userfiles/file/36995573754.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/5s8g4b616qiv3nqo9olnlvf1o6/vifujove.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/setixeravipowagut.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/18418742544.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/dunoledunot.pdfIn PDF document text
    • http://partnercable.hu/files/lenenijonowexifepobijo.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/38d1aca49cfb495b614e35cf4d52df84/17314788284.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c01e0f931---58866721477.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/cd410e18977e8d728816c8da9348b871/degufodexuwurexogewaxip.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16092b9cc5048b---gesokelorovobel.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/18594065842.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2afcaeb99---5435644857.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/65391846246.pdfIn PDF document text
    • http://babamoleskine.com/files/file/9222066308.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce9861f36f---53327561778.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/30247539226.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988854a1cdb---busar.pdfIn PDF document text
    • https://biocoils.com/img/file/tipokenepavazabifiza.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/26561755251.pdfIn PDF document text
    • http://prospr.fr/ckfinder/userfiles/files/9010730557.pdfIn PDF document text
    • http://tipiland.net/upload/file/pikoremaxawevozezufidek.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210612_BDA936477E0C0510.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=military+intelligence+training+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/dejif.pdfIn PDF document text
    • 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_off0000e740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE740 10616 bytes
SHA-256: d9fd65b8fa8e3728225b76a5abeaaa1192aade580ce1a722387401a2a2dd5e2a
font_01_sfnt_off0000ff68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF68 17328 bytes
SHA-256: 984cc585ba6564df8698990b43def2a6c5adb9124e5732728eef63ca62a9501f
font_02_sfnt_off00012cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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