Malicious PDF — malware analysis report

Static analysis result for SHA-256 1474e4bdf685492f…

MALICIOUS

PDF

42.4 KB Created: 2020-03-29 10:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d65ded5d0c72b00abcb946e8fc777355 SHA-1: 0e36ebcf2e41133f49070d9802ffa9c821cdca7e SHA-256: 1474e4bdf685492fdcbcad6e90c356ad515c2e911dc20360807142d63ee108fa
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which appear to be part of a link farm, suggesting a malicious intent to redirect users to potentially harmful content or exploit SEO tactics. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this assessment. No scripts were extracted, but the document body and heuristics point towards a phishing or redirection scheme.

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://74-123-77-90.mgwnet.com/uploads/1/3/0/6/130604392/130604392.html#consequencias+da+guerra+do+suez
    • http://reneeleaberger.com/uploads/1/3/0/4/130483205/jukije_sijokusijop_bidozomuxu_sutalub.pdf
    • http://octorock.net/uploads/1/3/0/3/130379514/6077219.pdf
    • http://melbournecounseling.net/uploads/1/3/0/5/130543685/5302083.pdf
    • http://bonfireweddings.com/uploads/1/3/0/7/130775048/derizakaxagoripiw.pdf
    • http://www.royalglossbrat.com/uploads/1/3/0/4/130489386/jaxawojana.pdf
    • http://roperlawoffice.com/uploads/1/3/0/3/130313024/667309.pdf
    • http://infinitetouch.net/uploads/1/3/0/4/130477039/a95ed2.pdf
    • http://mvptransfergreece.com/uploads/1/3/0/6/130639575/bebevew.pdf
    • http://marketdata-group.com/uploads/1/3/0/3/130313087/1751923.pdf
    • http://amazonfundllc.net/uploads/1/3/0/3/130313299/towonaluzirituja.pdf
    • http://www.jenniferpostma.com/uploads/1/3/0/2/130287506/777363.pdf
    • http://ligaoyulechengbocaixinxi.br3h.com/uploads/1/3/0/7/130775536/9900992.pdf
    • http://learnshareact.net/uploads/1/3/0/8/130874396/xafuk.pdf
    • http://www.decodedmedia.co.uk/uploads/1/3/0/3/130323559/xupunuso.pdf
    • http://aerogreensolutions.com/uploads/1/3/0/6/130603724/3b036a94a7.pdf
    • http://comparejetcharters.com/uploads/1/3/0/4/130493476/1145024.pdf
    • http://justinestein.com/uploads/1/3/0/5/130589199/jofujid_zakofusa_nuremoseteg.pdf
    • http://hitachimagicwand.us/uploads/1/3/0/4/130477890/2444603.pdf
    • http://virgointernational-ltd.com/uploads/1/3/0/5/130547078/bibuminatizigos.pdf
    • http://denisemariegaber.com/uploads/1/3/0/5/130588382/sifavumepavo.pdf
    • http://bkove.com/uploads/1/3/0/6/130639363/7c182321db164.pdf
    • http://onthelevelcarpentry.ca/uploads/1/3/0/9/130969384/bb920a9955317b.pdf
    • http://wedobettertogether.com/uploads/1/3/0/3/130379178/72907f8.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_off00007988.bin
7e8204c16a69c7a3e903b27fcfa1d66c41892ff2492165e6c2e3ec0d2bb38956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7988 9916 bytes

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