Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb8a7a345f67c17…

MALICIOUS

PDF

37.6 KB Created: 2020-06-12 18:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 227813976c91c5d346ea7230e39a3f3c SHA-1: c133586048d39f62af3cb354cbc21707f9a315db SHA-256: cdb8a7a345f67c17ae758ff11cb9babfc76b89dc6bd57df1dd8e64815fcce70d
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though partially corrupted, suggests a lure related to 'Mobil oyun yapma program1 indir t crk ce'. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports a malicious intent to drive traffic to potentially compromised or malicious content.

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://dropyours.com/uploads/1/3/0/8/130814597/130814597.html#mobil+oyun+yapma+program%25C4%25B1+indir+t%25C3%25BCrk%25C3%25A7e
    • http://rockthecatspa.org/uploads/1/3/0/5/130588246/zajisaguruva.pdf
    • http://baymill-aramasset.com/uploads/1/3/1/4/131405948/6093326.pdf
    • http://bodymedicannix.com/uploads/1/3/1/4/131410606/2048347.pdf
    • http://theroostersattic.com/uploads/1/3/0/5/130589217/1529991.pdf
    • http://dagsdivasandgentssocial.com/uploads/1/3/1/3/131379498/nizibimovolasu.pdf
    • http://godspeedmagazine.com/uploads/1/3/0/6/130639152/zimukalefofux.pdf
    • http://carlinarchitect.com/uploads/1/3/0/4/130483584/wazebegarow.pdf
    • http://ayayogaart.com/uploads/1/3/1/6/131636960/jodagetimunama.pdf
    • http://nilitis.com/uploads/1/3/1/8/131856311/347971.pdf
    • http://sydney.awrc.org.au/uploads/1/3/0/6/130604355/7b593c1.pdf
    • https://miloxeraf.files.wordpress.com/2020/06/wibururaruv.pdf
    • https://nuvekutivuj.files.wordpress.com/2020/06/6518992161.pdf
    • https://vimenemuzez.files.wordpress.com/2020/06/vezobiledirisowariro.pdf
    • https://gotexutag798502486.files.wordpress.com/2020/06/14881149711.pdf
    • https://wirugosep.files.wordpress.com/2020/06/13222740469.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_off0000643c.bin
05fd04c1a097a554434dcf92b10eb6cccb794e5dc5b942dedc5ddb038fa5af46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643C 11308 bytes

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