Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a14e00b09445a2a…

MALICIOUS

PDF

50.1 KB Created: 2020-04-02 11:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e0c26d63807651e76497038a28f02a2e SHA-1: fa199be96fcc691c892936781aaeadfe1b1501d9 SHA-256: 8a14e00b09445a2aab3037e3cd5b73d042f3b0f1ec623bde64d1680e5f7211bb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'fishing skill up guide', suggesting a social engineering pretext to drive traffic to malicious sites.

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://mrmacbiblebook2.com/uploads/1/3/0/9/130969454/130969454.html#ffxi+fishing+skill+up+guide
    • http://oncitynow21.com/uploads/1/3/0/2/130289653/9841922.pdf
    • http://fivestarorganizing.com/uploads/1/3/0/3/130323318/4887606.pdf
    • http://numbthemovie.net/uploads/1/3/0/5/130589245/goxiwore.pdf
    • http://chaosdragonboats.org/uploads/1/3/0/5/130589411/tototuwenipedubek.pdf
    • http://winenswine.com/uploads/1/3/0/4/130475997/1cfd052b4b8f0.pdf
    • http://monagarciamusic.com/uploads/1/3/0/8/130874058/komalunaretelaw.pdf
    • http://terrancedennis.com/uploads/1/3/0/2/130291783/883271.pdf
    • http://bowensupcycledbagsplus.com/uploads/1/3/0/6/130604363/1484962.pdf
    • http://alporusi.fi/uploads/1/3/0/2/130289232/puwobepikazi.pdf
    • http://biotatech.com/uploads/1/3/0/6/130621312/0aee155021dfa.pdf
    • http://cheesecakegang.com/uploads/1/3/0/5/130589389/giturumabuxisizizaz.pdf
    • http://truedoctrineofchrist.org/uploads/1/3/0/6/130621870/5381328.pdf
    • http://detourtowonderland.com/uploads/1/3/1/4/131437037/bedutaruribedax.pdf
    • http://therealmaddilenae.com/uploads/1/3/0/2/130271145/03162ff3384b.pdf
    • http://chadbowendesign.com/uploads/1/3/0/5/130539300/4109090.pdf
    • http://www.divinefamilyinterventions.org/uploads/1/3/0/5/130542813/9200476.pdf
    • http://geekdogma.com/uploads/1/3/1/3/131379792/depoji.pdf
    • http://agrarservicedreimann.de/uploads/1/3/0/9/130968962/fozagogowodit.pdf
    • http://acceleratesolution.com/uploads/1/3/0/6/130605349/rexebodogunobop.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f05.bin
511e90e562b1c960e342d862a7a7f33d3c0aa021155bae3a025983c9f77bdd3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F05 9036 bytes
font_01_sfnt_off0000b157.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB157 2652 bytes

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