Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc905e5b45669a3…

MALICIOUS

PDF

32.4 KB Created: 2020-04-05 14:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cd47d66525020d9bf295c509d815af01 SHA-1: 2120be17e6815c6b0e354220ed4888acf15b74c3 SHA-256: dcc905e5b45669a39f05a1187236a687df7793092f89abba464ba09931c4f4af
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links to various domains, indicating a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious. The document body contains text related to 'La cantante calva pdf descargar', suggesting a lure to download or view content, which redirects to a network of suspicious URLs.

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://blogeurotur.com/uploads/1/3/0/2/130272483/130272483.html#la+cantante+calva+pdf+descargar
    • http://pmc-english.com/uploads/1/3/0/9/130969079/bejizag.pdf
    • http://weybridge10k.com/uploads/1/3/0/9/130969001/farajizenor_velaratanisixuv_bipus_kukipedef.pdf
    • http://tinyhomexl.com/uploads/1/3/0/7/130776073/07a36b6ff726.pdf
    • http://psysourcecode.com/uploads/1/3/0/5/130589269/8988171.pdf
    • http://fortobello.com/uploads/1/3/0/6/130620538/4f4995c9fc72369.pdf
    • http://defenders-apparel.com/uploads/1/3/0/7/130740461/nilugojube-xajuli-nuxuxofifek.pdf
    • http://tenemedia.com/uploads/1/3/0/8/130873820/fetugewuselokat-daweben.pdf
    • http://mofouad.com/uploads/1/3/1/3/131398182/1353697.pdf
    • http://thursdayschildsailing.com/uploads/1/3/0/6/130621857/vuliditoxowiwub.pdf
    • http://nashvilledancecooperative.org/uploads/1/3/0/6/130621068/gasisasa.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055cb.bin
4dd5b28baeb311694bb59062e2795b6a705db7fe4bc180e10ecd989ff3328c8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55CB 8424 bytes

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