Malicious PDF — malware analysis report

Static analysis result for SHA-256 253252facb20f81e…

MALICIOUS

PDF

78.4 KB Created: 2021-09-16 09:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 25c4439c53b577a6b0b89a4cbfa6caa0 SHA-1: 3b9e16488508dc9e2e32ff8267f13fcfc00c55c7 SHA-256: 253252facb20f81ea8175684fa49798135b95a6b34eb6df239b2176acaf046be
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The PDF structure and heuristic firings point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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 https://catamma.ru/uplcv?utm_term=for+the+right+to+learn+malala+yousafzai%27s+story+pdf PDF link annotation
    • https://indiantiffin4me.com/nbloom/fckuploads/file/kukejupewatebu.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/dunukesafagoputatafeka.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1863ea862---wodigonamavuz.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/nofugivapapazuvo.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/vusekaganuvamenoges.pdfIn PDF document text
    • https://vitanov.rs/files/sevisi.pdfIn PDF document text
    • http://wildzipper.com/clients/wildzipper/userfiles/file/29207109563.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/foxelifat.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/76065615060.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/xagitevevepabij.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/peninut.pdfIn PDF document text
    • https://onwater.my/uploads/file/3241284653.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/sutojexirububeviturepit.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/tevononadunufajuwev.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/97940594310.pdfIn PDF document text
    • http://hasanmasat.com/ckfinder/userfiles/files/banefazekererekeleta.pdfIn PDF document text
    • https://southernwashpros.com/nbloom/fckuploads/file/75359249474.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/fipesusafevu.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/34a93c3c914cae88f9ada1d8a2f9dce4/fomikakozurevis.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/12776976077.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/foxepedapijezuwakugeni.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/24385664163.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_off0000ca55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA55 11232 bytes
SHA-256: 1cffcc4c40b8a7d19f77090dfed910acb2f8ad2459a4feb7dcfa07d861b6e137
font_01_sfnt_off0000e44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44E 18288 bytes
SHA-256: e783ebf030cc4627960a6ea7d22209928dee90c3282e8f079ef525e3861b5daa
font_02_sfnt_off00011374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11374 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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