Malicious PDF — malware analysis report

Static analysis result for SHA-256 252855b1884ca77f…

MALICIOUS

PDF

68.4 KB Created: 2021-09-28 08:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b4712bef395e8f9fcd093faf0d0b970e SHA-1: fb6062ef83207fc35ea4d9ea60d0705857e96668 SHA-256: 252855b1884ca77fe19defd32164ceacd60d2c36e7c8ff78bc93a9449ed7f898
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically identified as an external URI likely used for phishing or malware delivery. The PDF structure and embedded content suggest it acts as a lure to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cructi.ru/uplcv?utm_term=game+boxing+android PDF link annotation
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/54733454822.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/gunimanofedo.pdfIn PDF document text
    • http://www.moyekolodin.com/files/6168194765.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/948bfe6b7ee2645824254f1dd1d00ab9/24966659313.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/69653895014.pdfIn PDF document text
    • http://koala-al.com/d/files/jokowidizakijorabaven.pdfIn PDF document text
    • http://pentas.eu/userfiles/file/wosuvosuxugo.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/28500684560.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/nosol.pdfIn PDF document text
    • https://biodez.lt/i/File/xitavusoremijexotevo.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/92751471371.pdfIn PDF document text
    • http://ciskmv.com/css/file/sowifitagipakujugifij.pdfIn PDF document text
    • http://dungculamdep.com/fckeditor_userfiles/file/245736710.pdfIn PDF document text
    • https://giaphutelecom.com/tctt/sites/aaa/file/61842978694.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/73665751839.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/taxitegizewuj.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132fa9384a76---mazumewo.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/fobolukojugazabanewag.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/90758769445.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/gifagetamejulilugufivo.pdfIn PDF document text
    • https://investir-petroleo.pt/ckfinder/userfiles/files/39016523266.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/jabufojusumekonoraw.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/fizaruvatolafajutepibiri.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_off0000adf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADF7 10560 bytes
SHA-256: fb2285902a4708e7a3d205a02216324e2fecfc56e379f527f7f0a2e2e390a3a7
font_01_sfnt_off0000c5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDD 15340 bytes
SHA-256: 0b7ea562409f54198ca4c5b67c386cf93bc1669b63ca7913882623e776723c39

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