Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ecc11cfc8634c7…

MALICIOUS

PDF

38.0 KB Created: 2020-06-10 12:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6ed99bc06d1b426cafe3afa3f751ae7 SHA-1: 71c8069013e77be926528df35c84864d13a7f757 SHA-256: 01ecc11cfc8634c77a8c52281c97eb67c1542cfcf1100c7e37895389d7bd0fd8
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL points to an HTML file with a heavily encoded query string, suggesting a lure for users to click through to potentially malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the structure and embedded links suggest an attempt to redirect users to external sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://alluredollhouse.com/uploads/1/3/0/6/130639842/130639842.html#%25D0%25B4%25D0%25BE%25D0%25BB%25D0%25B3%25D0%25BE%25D0%25B6%25D0%25B4%25D0%25B0%25D0%25BD%25D0%25BD%25D0%25B0%25D1%258F+%25D0%25BB%25D1%258E%25D0%25B1%25D0%25BE%25D0%25B2%25D1%258C+%25D1%2584%25D0%25B8%25D0%25BB%25D1%258C%25D0%25BC+2008+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0
    • http://giancarlopuppo.com/uploads/1/3/0/9/130969172/xokepu.pdf
    • http://priscillasoares.com/uploads/1/3/1/4/131407736/lezuruvak.pdf
    • http://masonfamilyparalegal.com/uploads/1/3/1/0/131070845/7767108.pdf
    • http://connect2empower.org/uploads/1/3/1/8/131857315/5707293.pdf
    • http://carolinacollegeconsultants.net/uploads/1/3/2/3/132303286/71b878d.pdf
    • http://detailmastersfl.com/uploads/1/3/0/7/130738497/138247.pdf
    • http://freygoldphoto.com/uploads/1/3/0/5/130551006/8146481.pdf
    • http://hackingsmash64.lo-phi.com/uploads/1/3/0/3/130324191/9984410.pdf
    • http://operationsongcolorado.org/uploads/1/3/1/4/131454394/sagavegavunibe.pdf
    • http://living-twenty.com/uploads/1/3/0/3/130313319/4849509.pdf
    • http://hostmaster.nadi-haas.de/uploads/1/3/0/9/130969831/putonisiz_suxugamisobil_lugononixekafi_kefafalefulofi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://sawakaneko.files.wordpress.com/2020/06/redukexasug.pdf
    • https://vixemore.files.wordpress.com/2020/06/56930719994.pdf
    • https://datewaxota.files.wordpress.com/2020/06/tanamiti.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_off00005c5d.bin
5f96a44f0cd5377f9bf081902dbecaaa0607a8f36521cb1709b20a38d5b38849		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5D 14684 bytes

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