Malicious PDF — malware analysis report

Static analysis result for SHA-256 750f54a4159dd605…

MALICIOUS

PDF

44.8 KB Created: 2020-06-15 15:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d433926e37d76fa777c796ca7d2838f5 SHA-1: c4b305b473e29debd0efd7b01e6c4537679adfa2 SHA-256: 750f54a4159dd6054bb91faa17bd85b2d2de3d3775d9f33dba717e5ba33ba080
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM'. The document body, though heavily obfuscated, contains text related to drawing tutorials and the authoring application, suggesting a lure. The primary heuristic indicates a mass of external PDF links, with the highest confidence coming from the ML classifier. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gopinathanlab.com/uploads/1/3/0/7/130775987/130775987.html#how+to+draw+cartoons+tutorial
    • http://u2construction.com/uploads/1/3/0/6/130604415/jonam.pdf
    • http://liosndist33a.org/uploads/1/3/0/5/130543648/fobavuretixuwow.pdf
    • http://legacyrecordsmg.com/uploads/1/3/0/6/130605335/loredebewigajanur.pdf
    • http://ramirezlawllc.com/uploads/1/3/1/1/131164187/3164696.pdf
    • http://taiyangchengzhuwang.br3h.com/uploads/1/3/1/4/131454143/c9ded.pdf
    • http://lovedandfound.co.nz/uploads/1/3/1/4/131437130/muzigo.pdf
    • http://tappro.info/uploads/1/3/0/5/130550716/dolesemutarokol_rutuluxasi.pdf
    • http://sznbv.bpmtc.com/uploads/1/3/1/4/131453175/1e671adcc35a.pdf
    • http://autodiscover.farflungart.com/uploads/1/3/0/6/130621376/61dd197b25f1e6.pdf
    • http://erikaforbarrington.com/uploads/1/3/0/4/130476501/ruziro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pinkdaysk.redcross.ca/uploads/1/3/0/8/130814065/4572927.pdf
    • https://maforebe.files.wordpress.com/2020/06/lavemirawo.pdf
    • https://gavewune901380018.files.wordpress.com/2020/06/vesaminemu.pdf
    • https://xilolak.files.wordpress.com/2020/06/renepuwimojibexa.pdf
    • https://vufimadur.files.wordpress.com/2020/06/47648614213.pdf
    • https://wuwiwil.files.wordpress.com/2020/06/31814297115.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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082ff.bin
721c6c82b4643b86b38c1bebf35cf4811f8516e88b01ecb9f038f5053efae1f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82FF 10740 bytes

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