Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c75960562c224a…

MALICIOUS

PDF

44.2 KB Created: 2020-04-12 13:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e8c778f57dd7f5e3bc8d0a402b282066 SHA-1: 1d38ff29beb40880d606e5c95d374006ec5111f9 SHA-256: 62c75960562c224ad4958cbe49143ec6193f6a095c2a7f4435d1e94b4303807d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a dropper or downloader functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Dropper.Agent-8368406-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8368406-0
  • 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://ecityjava.com/uploads/1/3/0/2/130287488/130287488.html#ejercicios+de+series+geometricas+infinitas
    • http://gallopinglanemarketing.com/uploads/1/3/0/6/130640111/wezilifokabodowu.pdf
    • http://dollarchickennj.com/uploads/1/3/0/4/130476098/a5974654.pdf
    • http://808computertricks.com/uploads/1/3/0/5/130551775/edc77.pdf
    • http://prestigepc.net/uploads/1/3/1/0/131070043/lipufepo_tolutira.pdf
    • http://regattacanecorso.com/uploads/1/3/0/2/130274017/4096590.pdf
    • http://mwcouriers.com/uploads/1/3/0/5/130590235/fileginozasuxad.pdf
    • http://purehairincorporated.com/uploads/1/3/0/7/130776756/rokibupowa-zinotewejimolet-toxawarum.pdf
    • http://peterkayebooks.com/uploads/1/3/1/1/131163902/8085558.pdf
    • http://hollyshulman.com/uploads/1/3/1/3/131378771/4237150.pdf
    • http://barnardsinkibler.com/uploads/1/3/0/7/130775531/2100999.pdf
    • http://fearlesslove4god.com/uploads/1/3/0/7/130739090/xoruxibubusovanoferu.pdf
    • http://bobbiesbubbles.com/uploads/1/3/0/2/130270864/pibuzinemal_bivag_sufebubago_lifulelasexu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000697b.bin
2f92b2b0c14338e7ad6333c4b258a0b48dc0c94eb412c2ef75764feb8b317019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697B 9856 bytes
font_01_sfnt_off00008d96.bin
b080e6aa9682ff87567a230b404ab00780bafcfd3ba11e3f536b788ca6e08ef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D96 16060 bytes

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