Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f54b67783d3ded…

MALICIOUS

PDF

68.3 KB Created: 2021-09-30 16:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 50bef2078db7bbe681238174792f2f97 SHA-1: 44c5977ccfae9282f25e9b36fecda8a1d17757fc SHA-256: e8f54b67783d3dedf02c60b6373b0e80ef3994efcf2dad3cd8a0022c27819d29
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, many of which are structured as link farms, suggesting a phishing or malware distribution campaign. The PDF structure and embedded content are consistent with attempts to trick users into visiting these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=mod+ludo+apk PDF link annotation
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xubugikepef.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/67170263039.pdfIn PDF document text
    • http://icaalliance.org/filespath/files/20210922222320.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/walasadiniworovibife.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210910225447.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/77537434774.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/36840614003.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/81132331115.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/44313651329.pdfIn PDF document text
    • http://melodylavernebettencourt.com/media/file/56197602283.pdfIn PDF document text
    • https://termoformat.md/img/files/59142600172.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/76dc40b74d6be2e66f8ee0df3a65c8bb/kusol.pdfIn PDF document text
    • https://unitjaya.com/contents/files/sugomosevifipesudafaxob.pdfIn PDF document text
    • http://talesma.com/E/file/53022363534.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/risadulirirofepaf.pdfIn PDF document text
    • http://gomail.vazoom.com/pictures/65648751737.pdfIn PDF document text
    • https://insp.biz/img/file/ketopifava.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/75301388886.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/wolirenogored.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/salez.pdfIn PDF document text
    • http://ducnhua.com/upload/files/mutuwoxixewulogagasosis.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140375b3091c---19980948362.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/rerefekagilitelexerixot.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_off0000adea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC600 9876 bytes
SHA-256: 61801bf1cc15191ddca9259989252791a2941b2893af96bfc77da54a6e0893ae
font_02_sfnt_off0000dbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCF 15924 bytes
SHA-256: 8fab2e75294f0003c60ed96ab59166abb55315e5a57b20c1cf5f5d3af48af0ef

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