Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14c646f5983ae6c…

MALICIOUS

PDF

72.9 KB Created: 2021-09-18 06:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c36f4447e1cd68471e1c5c56839bae55 SHA-1: 58222a571d3277e4c48bf0e3ec3609bec8cfd7e3 SHA-256: b14c646f5983ae6cce845d0cfc0ae9a03c4a7e4428ae637998619d835ff5292a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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 https://oniceh.ru/uplcv?utm_term=my+hero+academia+ebook+download PDF link annotation
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eaee62ae45---79734089542.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/niwaloxirojok.pdfIn PDF document text
    • http://humanlitech.com/files/files/48384882422.pdfIn PDF document text
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/25107708749.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/zomoditidatekiba.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/88715970166.pdfIn PDF document text
    • http://samocvet.org/foto/ck/files/zokilusonapo.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210910_F02D7D2C71E9CF49.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/vazovesuzopesun.pdfIn PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/55781553767.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/sivuwavin.pdfIn PDF document text
    • http://phamtrangia.com/upload/files/bifewadefigivol.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/bokawoweferafodosizazozar.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109010659061507.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/38258706880.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/92545256400.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/41237726579.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/49599108991.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/898fd7edf4758d4d38b0d24eb4fe76a8/74593313490.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/nefukek.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_off0000b463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB463 18316 bytes
SHA-256: 7e587ba94a09c67c00aaebf5c6a1e14113f11dbea18efbc2a5ee6afa62f6ba7b
font_01_sfnt_off0000e47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC92 10796 bytes
SHA-256: 898249515e85d47f7e2684a1228fd08637bbe150dd22834995f1d8a21b6a1345

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