Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1be711ab53e4f8…

MALICIOUS

PDF

36.1 KB Created: 2020-03-24 02:04:32 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 23323eb04df216fc893d5b8cf06bc7b2 SHA-1: 8734c192fdd6d97bbf54bd56f75107ea67781df3 SHA-256: fb1be711ab53e4f808204e062d4249fdbdcdcc8a3d0ad5cf449ebda6a27722ed
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named PDFs hosted on various domains. This pattern is indicative of an SEO spam or link farm tactic, designed to drive traffic to these sites. The document body, though partially corrupted, contains a title related to physical coordination capabilities, suggesting a lure to disguise the malicious intent of redirecting users to potentially harmful external content. 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://artistreadings.com/uploads/1/3/0/5/130543945/130543945.html#que+significa+capacidades+fisicas+coordinativas
    • http://billcummings.org/uploads/1/3/0/7/130776208/5262002.pdf
    • http://lashesbycalina.com/uploads/1/3/0/2/130272242/gotiwusopir.pdf
    • http://dyconseils.org/uploads/1/3/0/3/130313470/9a863906bf48.pdf
    • http://jamedicalconsulting.com/uploads/1/3/0/6/130604108/zinaga_jaxijitodanug_zofubile.pdf
    • http://www.sarahshawdesigns.com/uploads/1/3/0/3/130313309/wivugizitevajo_pumebu_pivebakirek_sufupibezi.pdf
    • http://themedicalscienceeditor.net/uploads/1/3/0/9/130969154/lefijudelos.pdf
    • http://1customerwon.com/uploads/1/3/0/5/130540405/namulo_sesekoxogezo.pdf
    • http://lynnpages.co.uk/uploads/1/3/0/9/130969855/30059.pdf
    • http://pamelakfulmer.com/uploads/1/3/0/6/130639867/5819417.pdf
    • http://vanchinos.com/uploads/1/3/0/6/130639379/6358205.pdf
    • http://ourbayclub.com/uploads/1/3/0/5/130551247/6868808.pdf
    • http://masteringlifeandrelationship.com/uploads/1/3/0/5/130543868/9e54f1bb76.pdf
    • http://ujcdsgn.com/uploads/1/3/0/6/130605426/guvafigobewutovupes.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_off000064a4.bin
e5c3cebe6997374037e9a8bb06f770aa09c41471ed5b6e7d074bc1b3648897d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A4 7868 bytes

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