Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e25fa54d46b2a3c…

MALICIOUS

PDF

73.2 KB Created: 2021-09-30 10:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 980b68b5591f61101c2e034b7ecc2492 SHA-1: 5bc1ce233417478df92d452683db4c10a5e3e2e6 SHA-256: 3e25fa54d46b2a3cfccfc1f678b73c8dcd93959f92c9c1a3c844f4cf59cd9323
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains embedded JavaScript and a link farm pointing to compromised WordPress upload storage and other disposable hosting domains, suggesting an attempt to distribute further malicious content or phish users. The presence of these links and the ML detection strongly indicate a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a476898e33---50697753892.pdf In PDF document text
    • https://drosamahetta.com/userfiles/file/beputojokabigo.pdfIn PDF document text
    • http://myepres.com/HotelEstimator/userfiles/file/24934008083.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/vazukuzam.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/sidijadari.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/paparaxawidadunena.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/84271578505.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/61719492344.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144588b0e398---14216575879.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/58840812765.pdfIn PDF document text
    • https://agros.net/uploads/file/98569721534.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/vozojofarakido.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/15759274438.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/rowuvakulavufofawazapi.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/89269387543.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612edb5f9820c---luvarenefubeja.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/fepokizezulezus.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/gijevobuguta.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/kukakikomozugob.pdfIn PDF document text
    • https://tcremich.lu/files/files/bawexaze.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/nifoxilopogokofal.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/57581689274.pdfIn PDF document text
    • http://hnfhdc.com/UpLoadFile/2021092107080312246.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/7623412236.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/1097232278.pdfIn PDF document text
    • https://pu-sk.com/app/templates/js/ckfinder/userfiles/files/lixijapubiligexometo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=download+panzoid+apkPDF 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_off0000ba5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5E 17812 bytes
SHA-256: 19dd945e6220b75bf641f47dbd7d39bffca1a920a5104e5333249adf81352242
font_01_sfnt_off0000e7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFD 10124 bytes
SHA-256: df5d5de183bc6baa88cea8a45600eedcdf78f81b1c9d4308bd8d38a9dbf67c0c

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